Natural sciences, Biogeoscience

2019 - Present
Japan Agency for Marine-Earth Science and Technology, Research Institute for Marine Resources Utilization, Director-General

2014 - 2019
JAMSTEC, Department of Biogeochemistry, Director

2009 - 2014
JAMSTEC, Institute of Biogeosciences, Program Director

2005 - 2009
JAMSTEC, Institute for Frontier Research on Earth Evolution, Group Leader

2002 - 2005
JAMSTEC, Institute for Frontier Research on Earth Evolution, Research Scientist

2017 - Present
Editor, American Chemical Society "ACS Earth and Space Chemistry"

2013 - Present
Executive Committee Member, Organic Geochemistry Division, Geochemical Society

2012 - Present
Vice Executive Editor, Geochemical Journal

2009 - Present
サイエンスボードメンバー, 日本地球惑星科学連合

2009 - Present
代議員, 日本地球惑星科学連合

2008 - Present
Review Board Member, Scientific Drilling

2010 - 2019
委員, 東京大学 大気海洋研究所 共同運営委員会

2014 - 2018
委員, 国立極地研究所 氷床コア研究委員会

2013 - 2018
幹事, J-DESC IODP部会

Satoshi Furota; Naoto F. Ishikawa; Nanako O. Ogawa; Toshio Furota; Naohiko Ohkouchi
Tracing terrestrial nitrogen contributions to the salt marsh food web of the Obitsu River estuary in Tokyo Bay using compound-specific δ15N analysis of amino acids
Progress in Earth and Planetary Science, 09 Mar. 2026
13, 1, 18
[Reviewed]

Yuchen Sun; Naoto F. Ishikawa; Nanako O. Ogawa; Yoshinori Takano; Naohiko Ohkouchi
Carbon isotopic changes of 16 proteinogenic amino acids during trophic transfer in a cultured marine consumer
Progress in Earth and Planetary Science, 28 Jan. 2026
13, 1

Takumi Tsutaya; Natsumi Aruga; Naoto F. Ishikawa; Yoko Sasaki; Haruka Kitayama; Minoru Yoneda; Nana O. Ogawa; Naohiko Ohkouchi; Chie Hashimoto
Carbon and Nitrogen Stable Isotopic Profiling of Chimpanzees and Monkeys in Kalinzu Forest Reserve, Uganda
American Journal of Primatology, 20 Jan. 2026
88, 1

Toshihiro Yoshimura; Qing Chang; Naohiko Ohkouchi; Yoshiyuki Ishitani; Dana Ulanova; Hirotoshi Endo; Junichiro Kuroda; Yurika Ujiié
Chamber‐by‐Chamber Measurements of Planktonic Foraminiferal Mg, Sr, and Na to Ca Ratios With Femtosecond LA‐ICP‐MS
Rapid Communications in Mass Spectrometry, 19 Jan. 2026
40, 7

C. Yoshikawa; H. Yamaguchi; N.O. Ogawa; A. Makabe; M. Sato; Y. Mino; K. Matsumoto; Y. Nakano; S. Kawagucci; T. Fujiki; N. Harada; M. Kawachi; N. Ohkouchi
Nitrogenous sources for summertime phytoplankton at two contrasting stations in the subarctic and subtropical western North Pacific
Progress in Oceanography, Jan. 2026
240, 103614, 103614

Nanako O. Ogawa; Yoshinori Takano; Yu Itahashi; Naoto F. Ishikawa; Naohiko Ohkouchi
Working standards and analytical framework for CSIA: isotopic composition (δ13C, δ15N, and δ34S) of 21 amino acids and 7 nucleobases
Progress in Earth and Planetary Science, 06 Dec. 2025
12, 1

Masanori Kaneko; Yoshinori Takano; Yuta Isaji; Nanako O. Ogawa; Yoshito Chikaraishi; Naoto F. Ishikawa; Hiroyuki Imachi; Yoshihiro Takaki; Miyuki Ogawara; Fumie Kabashima; Martin Krüger; Naohiko Ohkouchi
Nitrogen and carbon flows in a microbial mat involving anaerobic oxidation of methane in northwestern Black Sea: perspectives from nitrogen and carbon isotopic composition of coenzyme F430 and its biosynthetic pathway
Progress in Earth and Planetary Science, 06 Dec. 2025
12, 1

Yu Itahashi; Yoshinori Takano; Yoshito Chikaraishi; Nanako O. Ogawa; Naoto F. Ishikawa; Naohiko Ohkouchi; Masako Yamane; Yusuke Yokoyama; Minoru Yoneda
Purification of hydroxyproline for small-scale radiocarbon dating verified using archaeological bone collagen
Progress in Earth and Planetary Science, 01 Dec. 2025
12, 1

Nanako O. Ogawa; Toshihiro Yoshimura; Takeru Kochi; Junichiro Kuroda; Yoshinori Takano; Naohiko Ohkouchi
Nanomolar-scale sulfate sulfur isotope analysis using a combined ion chromatography–barite precipitation and nano-EA/IRMS
Progress in Earth and Planetary Science, 29 Oct. 2025
12, 1

Masashi Tsuchiya; Takao Yoshida; Yoshito Chikaraishi; Nanako O. Ogawa; Hidetaka Nomaki; Yoshihiro Fujiwara; Yasuhiko T. Yamaguchi; Yohei Tada; Robert G. Jenkins; Yoko Sasaki; Katsunori Fujikura; Naohiko Ohkouchi
Nitrogen isotopic composition of amino acids reveals a variety of trophic ecology of organisms inhabiting chemosynthesis-based ecosystems
Progress in Earth and Planetary Science, 15 Oct. 2025
12, 1

Thomas M. Blattmann; Yuchen Sun; Nanako O. Ogawa; Yoshinori Takano; Negar Haghipour; Naoto F. Ishikawa; Timothy I. Eglinton; Naohiko Ohkouchi
Chromatographic isolation for performing enantiomer-specific radiocarbon analysis (ESRA): first method development for individual L- and D-amino acids
Progress in Earth and Planetary Science, 29 Sep. 2025
12, 1

Takahito Ikenoue; Nanako O. Ogawa; Hidetaka Nomaki; Katsunori Kimoto; Makio C. Honda; Naohiko Ohkouchi; Tetsuichi Fujiki
New evaluation of vertical particulate organic carbon fluxes of submillimeter-sized phaeodarians in the mesopelagic twilight zone of the western North Pacific Ocean
Progress in Earth and Planetary Science, 10 Sep. 2025
[Reviewed]

Yuta Hirakawa; Toshiki Koga; Takahiro Suzuki; Naohiko Ohkouchi; Yoshinori Takano
Analytical Development for Detecting Femtomole-Level Organophosphorus Compounds in Biogeochemical Samples by Ion Chromatography/High-Resolution Mass Spectrometry
ACS Omega, 31 Aug. 2025
10, 36, 42061, 42067

Toshiki Koga; Yasuhiro Oba; Yoshinori Takano; Hiroshi Naraoka; Nanako Ogawa; Kazunori Sasaki; Hajime Sato; Toshihiro Yoshimura; Naohiko Ohkouchi
A complete set of canonical nucleobases in asteroid Ryugu demonstrates their prevalence in carbonaceous asteroids
11 Aug. 2025

Eitaro Wada; Yoshihisa Kudo; Hiroshi Mizutani; Hiroshi Minami; Kenji Matsubara; Yoshihiro Yamada; Nanako O. Ogawa; Yukihiro Kohmatsu; Naoko Nishizawa; Isamu Shimizu; Reiichiro Ishii; Fujio Hyodo; Maki N. Aita; Wataru Sakamoto; Naohiko Ohkouchi
Gleaning of δ15N in ecosystems and its animal-organ isotope data: perspectives for the construction of the isotopically ordered world
Progress in Earth and Planetary Science, 01 Aug. 2025
12, 1

Chisato Yoshikawa; Nanako O. Ogawa; Naoto F. Ishikawa; Michio Yoneda; Ryuji Yukami; Shin-ichi Ito; Naohiko Ohkouchi
Nitrogen and carbon isotopic relationships in the diet and eye lenses of chub mackerel revealed in a laboratory rearing experiment
Progress in Earth and Planetary Science, 23 Jul. 2025
12, 1

Arisa Shiga; Jun Matsubayashi; Nanako O. Ogawa; Naohiko Ohkouchi; Noriko Iwai
Assessing the applicability of sequential eye lens stable isotope analysis for reconstructing dietary histories in amphibians
Limnology and Oceanography: Methods, 26 Apr. 2025

Toshihiro Yoshimura; Naoto F. Ishikawa; Nanako O. Ogawa; Soichiro Kusaka; Shigeyuki Wakaki; Tsuyoshi Ishikawa; Kazuya Nagaishi; Masanori Kaneko; Yuta Isaji; Yoshito Chikaraishi; Naohiko Ohkouchi
Magnesium isotopic variation in marine fish organs
Progress in Earth and Planetary Science, 06 Mar. 2025
12, 1

Toshiki Koga; Yoshinori Takano; Nanako O. Ogawa; Emily H. Hollingsworth; Yasuhiro Oba; Naohiko Ohkouchi
Compound-Specific Carbon and Nitrogen Isotopic Analyses of Underivatized Pyrimidine and Purine Nucleobases
ACS Earth and Space Chemistry, 03 Mar. 2025
9, 3, 424, 432

Hironao Matsumoto; Kotaro Shirai; Akira Ishikawa; Naohiko Ohkouchi; Nanako O. Ogawa; Maria Luisa G. Tejada; Atsushi Ando; Junichiro Kuroda; Katsuhiko Suzuki
Multidisciplinary evidence for synchroneity between Ontong Java Nui volcanism and early Aptian oceanic anoxic event 1a
Science Advances, 28 Feb. 2025
11, 9

Hiroto Kajita; Yusuke Suganuma; Yuki Haneda; Makoto Okada; Masanobu Yamamoto; Osamu Seki; Naohiko Ohkouchi
Seasonal Sea Surface Temperature Variations at the Northern Limit of the Kuroshio Current in Marine Isotope Stage 20–18
Geophysical Research Letters, 16 Feb. 2025
52, 3

Yuta Isaji; Koji Sugie; Naoto F. Ishikawa; Nanako O. Ogawa; Kazuhiko Matsumoto; Chisato Yoshikawa; Hajime Obata; Makio C. Honda; Naohiko Ohkouchi
Distributions of heme B and its implications on Fe biogeochemistry in the eastern Indian Ocean and the western North Pacific Ocean
Progress in Earth and Planetary Science, 11 Feb. 2025
12, 1

Hidetaka Nomaki; Yoshito Chikaraishi; Nanako O. Ogawa; Koh Maki; Motohiro Shimanaga; Hisami Suga; Masashi Tsuchiya; Toshi Nagata; Naohiko Ohkouchi
Differential use of multiple food sources at a bathyal benthic ecosystem in the central Sagami Bay revealed by amino acid nitrogen isotopic compositions
Progress in Earth and Planetary Science, 15 Jan. 2025
12, 1

Naoto F. Ishikawa; Yoshitoshi Uehara; Takuya Ishida; Tohru Ikeya; Satoshi Asano; Chia-Ying Ko; Tomoya Iwata; Ichiro Tayasu; Naohiko Ohkouchi; Noboru Okuda
Spatiotemporal variations in integrated trophic positions of stream macroinvertebrate communities
Progress in Earth and Planetary Science, 03 Jan. 2025
12, 1

Aymeric Pierre Marie Servettaz; Yuta Isaji; Chisato Yoshikawa; Yanghee Jang; Boo-Keun Khim; Yeongjun Ryu; Daniel M. Sigman; Nanako O. Ogawa; Francisco J. Jiménez-Espejo; Naohiko Ohkouchi
Sea ice and mixed layer depth influence on nitrate depletion and associated isotopic effects in the Drake Passage – Weddell Sea region, Southern Ocean
06 Dec. 2024

Juan Ochando; Francisco J. Jiménez-Espejo; Francisco Giles-Guzmán; Carlos Neto de Carvalho; Jose S. Carrión; Fernando Muñiz; Juan Manuel Rubiales; Pedro Cura; João Belo; Stewart Finlayson; Belen Martrat; Barend L. van Drooge; Gonzalo Jiménez-Moreno; Antonio García-Alix; Jose Antonio Lozano Rodríguez; Rosa María Albert; Naohiko Ohkouchi; Nanako Ogawa; Hisami Suga; Jon Camuera; Francisca Martínez-Ruiz; Joan Villanueva; Oriol Teruel; Nina Davtian; Noel Moreira; Zain Belaústegui; Joaquín Rodríguez-Vidal; Manuel Munuera; Alex Menez; Geraldine Finlayson; Clive Finlayson
A Neanderthal's specialised burning structure compatible with tar obtention
Quaternary Science Reviews, Dec. 2024
346, 109025, 109025

Yuchen Sun; Thomas M. Blattmann; Yoshinori Takano; Nanako O. Ogawa; Yuta Isaji; Naoto F. Ishikawa; Naohiko Ohkouchi
Enantiomer-Specific Stable Carbon and Nitrogen Isotopic Analyses of Underivatized Individual l- and d-Amino Acids by HPLC + HPLC Separation and Nano-EA/IRMS
Analytical Chemistry, 15 Nov. 2024
[Reviewed]

Miyabi Nakabayashi; Takumi Tsutaya; Abdul Hamid Ahmad; Yoko Sasaki; Nanako O. Ogawa; Naoto F. Ishikawa; Naohiko Ohkouchi
Dietary partitioning in sympatric Paradoxurinae civets in Borneo suggested by compound-specific nitrogen isotope analysis of amino acids
Progress in Earth and Planetary Science, 02 Oct. 2024
11, 1

Emi Arai; Masaru Hasegawa; Chikage Yoshimizu; Naoto F Ishikawa; Naohiko Ohkouchi; Ichiro Tayasu
Divergent ornamentation within a single population of the barn swallow
Journal of Evolutionary Biology, 09 Sep. 2024

Toshihiro Yoshimura; Daisuke Araoka; Hiroshi Naraoka; Saburo Sakai; Nanako O. Ogawa; Hisayoshi Yurimoto; Mayu Morita; Morihiko Onose; Tetsuya Yokoyama; Martin Bizzarro; Satoru Tanaka; Naohiko Ohkouchi; Toshiki Koga; Jason P. Dworkin; Tomoki Nakamura; Takaaki Noguchi; Ryuji Okazaki; Hikaru Yabuta; Kanako Sakamoto; Toru Yada; Masahiro Nishimura; Aiko Nakato; Akiko Miyazaki; Kasumi Yogata; Masanao Abe; Tatsuaki Okada; Tomohiro Usui; Makoto Yoshikawa; Takanao Saiki; Satoshi Tanaka; Fuyuto Terui; Satoru Nakazawa; Sei-ichiro Watanabe; Yuichi Tsuda; Shogo Tachibana; Yoshinori Takano
Breunnerite grain and magnesium isotope chemistry reveal cation partitioning during aqueous alteration of asteroid Ryugu
Nature Communications, 05 Sep. 2024
15, 1

Naohiko Ohkouchi; Yuta Isaji; Nanako O. Ogawa
Regulation of nitrogen isotopic ratios of cellular components
Progress in Earth and Planetary Science, 22 Aug. 2024
11, 1

Shinya Yamamoto; Yosuke Miyairi; Yusuke Yokoyama; Yukihiko Serisawa; Hisami Suga; Nanako O. Ogawa; Naohiko Ohkouchi
Compound-specific radiocarbon analysis of sedimentary fatty acids: Potential as a dating tool for lake sediments of Mt. Fuji volcanic region, Japan
Organic Geochemistry, Aug. 2024
104860, 104860

Kai Nils Nitzsche; Toshihiro Yoshimura; Naoto F. Ishikawa; Hodaka Kawahata; Nanako O. Ogawa; Katsuhiko Suzuki; Daisuke Araoka; Naohiko Ohkouchi
Zinc isotope fractionation during the sorption of Zn to minerals and organic matter in sediment cores affected by anthropogenic pollution
Applied Geochemistry, Aug. 2024
169, 106047, 106047
[Reviewed]

Yoshinori Takano; Hiroshi Naraoka; Jason P. Dworkin; Toshiki Koga; Kazunori Sasaki; Hajime Sato; Yasuhiro Oba; Nanako O. Ogawa; Toshihiro Yoshimura; Kenji Hamase; Naohiko Ohkouchi; Eric T. Parker; José C. Aponte; Daniel P. Glavin; Yoshihiro Furukawa; Junken Aoki; Kuniyuki Kano; Shin-ichiro M. Nomura; Francois-Regis Orthous-Daunay; Philippe Schmitt-Kopplin; Aogu Furusho; Minako Hashiguchi; Kazuhiko Fukushima; Dan Aoki; Hannah L. McLain; Jamie E. Elsila; Heather V. Graham; John M. Eiler; Norbert Hertkorn; Alexander Ruf; Cédric Wolters; Junko Isa; Véronique Vuitton; Roland Thissen; Saburo Sakai; Haruna Sugahara; Hajime Mita; Yoshito Chikaraishi; Takaaki Yoshikawa; Satoru Tanaka; Mayu Morita; Morihiko Onose; Daisuke Araoka; Fumie Kabashima; Kosuke Fujishima; Hajime Sato; Tomoya Yamazaki; Yuki Kimura; Hisayoshi Yurimoto; Tomoki Nakamura; Takaaki Noguchi; Ryuji Okazaki; Hikaru Yabuta; Kanako Sakamoto; Toru Yada; Masahiro Nishimura; Aiko Nakato; Akiko Miyazaki; Kasumi Yogata; Masanao Abe; Tatsuaki Okada; Tomohiro Usui; Makoto Yoshikawa; Takanao Saiki; Satoshi Tanaka; Fuyuto Terui; Satoru Nakazawa; Sei-ichiro Watanabe; Yuichi Tsuda; Shogo Tachibana
Primordial aqueous alteration recorded in water-soluble organic molecules from the carbonaceous asteroid (162173) Ryugu
Nature Communications, 10 Jul. 2024
15, 1

P Methou; NO Ogawa; H Nomaki; N Ohkouchi; C Chen; K Schnabel
Genetic connectivity and isotopic niches of alvinocaridid shrimps from chemosynthetic habitats in Aotearoa/New Zealand, with a new Alvinocaris species
Marine Ecology Progress Series, 04 Jul. 2024
739, 85, 109

Aogu Furusho; Chiharu Ishii; Takeyuki Akita; Mai Oyaide; Masashi Mita; Hiroshi Naraoka; Yoshinori Takano; Jason P. Dworkin; Yasuhiro Oba; Toshiki Koga; Kazuhiko Fukushima; Dan Aoki; Minako Hashiguchi; Hajime Mita; Yoshito Chikaraishi; Naohiko Ohkouchi; Nanako O. Ogawa; Saburo Sakai; Daniel P. Glavin; Jamie E. Elsila; Eric T. Parker; José C. Aponte; Hannah L. McLain; Francois-Regis Orthous-Daunay; Véronique Vuitton; Roland Thissen; Cédric Wolters; Philippe Schmitt-Kopplin; Alexander Ruf; Junko Isa; Norbert Hertkorn; John M. Eiler; Toshihiro Yoshimura; Haruna Sugahara; Heather V. Graham; Yoshihiro Furukawa; Daisuke Araoka; Satoru Tanaka; Takaaki Yoshikawa; Fumie Kabashima; Kazunori Sasaki; Hajime Sato; Tomoya Yamazaki; Morihiko Onose; Mayu Morita; Yuki Kimura; Kuniyuki Kano; Junken Aoki; Kosuke Fujishima; Shin-ichiro Nomura; Shogo Tachibana; Tomoki Nakamura; Takaaki Noguchi; Ryuji Okazaki; Hikaru Yabuta; Hisayoshi Yurimoto; Kanako Sakamoto; Toru Yada; Masahiro Nishimura; Aiko Nakato; Akiko Miyazaki; Kasumi Yogata; Masanao Abe; Tomohiro Usui; Makoto Yoshikawa; Takanao Saiki; Satoshi Tanaka; Fuyuto Terui; Satoru Nakazawa; Tatsuaki Okada; Sei-ichiro Watanabe; Yuichi Tsuda; Kenji Hamase
Enantioselective three-dimensional high-performance liquid chromatographic determination of amino acids in the Hayabusa2 returned samples from the asteroid Ryugu
Journal of Chromatography Open, May 2024
5, 100134, 100134

Hidetaka Nomaki; Chong Chen; Nanako O. Ogawa; Yosuke Miyairi; Naohiko Ohkouchi; Akiko Makabe; Shinsuke Kawagucci; Yusuke Yokoyama; Motohiro Shimanaga
Elucidating carbon sources of hydrothermal vent animals using natural 14C abundances and habitat water temperature
Limnology and Oceanography, 19 Apr. 2024
[Reviewed]

Kai Nils Nitzsche; Naoto F Ishikawa; Toshihiro Yoshimura; Hiroto Kajita; Hodaka Kawahata; Nanako O Ogawa; Hisami Suga; Naohiko Ohkouchi
Historical trend of polycyclic aromatic hydrocarbons in a sediment core from Osaka Bay during the Meghalayan
The Holocene, 16 Mar. 2024

Haruna Sugahara; Toshihiro Yoshimura; Yusuke Tamenori; Yoshinori Takano; Nanako O Ogawa; Yoshito Chikaraishi; Naohiko Ohkouchi
Nitrogen K-edge X-ray adsorption near-edge structure spectroscopy of chemically adsorbed ammonia gas on clay minerals and the 15N/14N-nitrogen isotopic fractionation.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 05 Feb. 2024

Chisato Yoshikawa; Masahito Shigemitsu; Akitomo Yamamoto; Akira Oka; Naohiko Ohkouchi
A nitrogen isoscape of phytoplankton in the western North Pacific created with a marine nitrogen isotope model
Frontiers in Marine Science, 22 Jan. 2024
11

Toshiki Koga; Yoshinori Takano; Yasuhiro Oba; Hiroshi Naraoka; Naohiko Ohkouchi
Abundant extraterrestrial purine nucleobases in the Murchison meteorite: Implications for a unified mechanism for purine synthesis in carbonaceous chondrite parent bodies
Geochimica et Cosmochimica Acta, Jan. 2024
365, 253, 265

Philippe Schmitt-Kopplin; Norbert Hertkorn; Mourad Harir; Franco Moritz; Marianna Lucio; Lydie Bonal; Eric Quirico; Yoshinori Takano; Jason P. Dworkin; Hiroshi Naraoka; Shogo Tachibana; Tomoki Nakamura; Takaaki Noguchi; Ryuji Okazaki; Hikaru Yabuta; Hisayoshi Yurimoto; Kanako Sakamoto; Toru Yada; Masahiro Nishimura; Aiko Nakato; Akiko Miyazaki; Kasumi Yogata; Masanao Abe; Tomohiro Usui; Makoto Yoshikawa; Takanao Saiki; Satoshi Tanaka; Fuyuto Terui; Satoru Nakazawa; Tatsuaki Okada; Sei ichiro Watanabe; Yuichi Tsuda; Kenji Hamase; Aogu Furusho; Minako Hashiguchi; Kazuhiko Fukushima; Dan Aoki; José C. Aponte; Eric T. Parker; Daniel P. Glavin; Hannah L. McLain; Jamie E. Elsila; Heather V. Graham; John M. Eiler; Alexander Ruf; Francois Regis Orthous-Daunay; Junko Isa; Véronique Vuitton; Roland Thissen; Nanako O. Ogawa; Saburo Sakai; Toshihiro Yoshimura; Toshiki Koga; Haruna Sugahara; Naohiko Ohkouchi; Hajime Mita; Yoshihiro Furukawa; Yasuhiro Oba
Soluble organic matter Molecular atlas of Ryugu reveals cold hydrothermalism on C-type asteroid parent body
Nature Communications, Dec. 2023
14, 1

Takeru Kochi; Toshihiro Yoshimura; Nanako O. Ogawa; Naohiko Ohkouchi; Yasuyuki Kobayashi; Junichiro Kuroda
Carbonate Associated Sulfate Extraction Method Using Weakly Acidic Cation Exchange Resins
Geostandards and Geoanalytical Research, 20 Nov. 2023
48, 1

Toshihiro Yoshimura; Yoshinori Takano; Hiroshi Naraoka; Toshiki Koga; Daisuke Araoka; Nanako O. Ogawa; Philippe Schmitt-Kopplin; Norbert Hertkorn; Yasuhiro Oba; Jason P. Dworkin; José C. Aponte; Takaaki Yoshikawa; Satoru Tanaka; Naohiko Ohkouchi; Minako Hashiguchi; Hannah McLain; Eric T. Parker; Saburo Sakai; Mihoko Yamaguchi; Takahiro Suzuki; Tetsuya Yokoyama; Hisayoshi Yurimoto; Tomoki Nakamura; Takaaki Noguchi; Ryuji Okazaki; Hikaru Yabuta; Kanako Sakamoto; Toru Yada; Masahiro Nishimura; Aiko Nakato; Akiko Miyazaki; Kasumi Yogata; Masanao Abe; Tatsuaki Okada; Tomohiro Usui; Makoto Yoshikawa; Takanao Saiki; Satoshi Tanaka; Fuyuto Terui; Satoru Nakazawa; Sei-ichiro Watanabe; Yuichi Tsuda; Shogo Tachibana; Kenji Hamase; Aogu Furusho; Kazuhiko Fukushima; Dan Aoki; Daniel P. Glavin; Hannah L. McLain; Jamie E. Elsila; Heather V. Graham; John M. Eiler; Alexander Ruf; Francois-Regis Orthous-Daunay; Cédric Wolters; Junko Isa; Véronique Vuitton; Roland Thissen; Haruna Sugahara; Hajime Mita; Yoshihiro Furukawa; Yoshito Chikaraishi; Mayu Morita; Morihiko Onose; Fumie Kabashima; Kosuke Fujishima; Hajime Sato; Kazunori Sasaki; Kuniyuki Kano; Shin-ichiro M. Nomura; Junken Aoki; Tomoya Yamazaki; Yuki Kimura
Chemical evolution of primordial salts and organic sulfur molecules in the asteroid 162173 Ryugu
Nature Communications, 18 Sep. 2023
14, 1

Akihiro Tame; Tadashi Maruyama; Tetsuro Ikuta; Yoshihito Chikaraishi; Nanako O Ogawa; Masashi Tsuchiya; Kiyotaka Takishita; Miwako Tsuda; Miho Hirai; Yoshihiro Takaki; Naohiko Ohkouchi; Katsunori Fujikura; Takao Yoshida
mTORC1 regulates phagosome digestion of symbiotic bacteria for intracellular nutritional symbiosis in a deep-sea mussel.
Science advances, 25 Aug. 2023
9, 34, eadg8364

Yuchen Sun; Nanako O. Ogawa; Naoto F. Ishikawa; Thomas M. Blattmann; Yoshinori Takano; Naohiko Ohkouchi
Application of a porous graphitic carbon column to carbon and nitrogen isotope analysis of underivatized individual amino acids using high‐performance liquid chromatography coupled with elemental analyzer/isotope ratio mass spectrometry
Rapid Communications in Mass Spectrometry, 02 Aug. 2023
37, 17

Yuto Kaku; Noriyuki Isobe; Nanako O. Ogawa; Naohiko Ohkouchi; Tetsuro Ikuta; Tsuguyuki Saito; Shuji Fujisawa
Chitin nanofiber-coated biodegradable polymer microparticles via one-pot aqueous process
Carbohydrate Polymers, Jul. 2023
312, 120828, 120828

Yasuhiro Oba; Toshiki Koga; Yoshinori Takano; Nanako O. Ogawa; Naohiko Ohkouchi; Kazunori Sasaki; Hajime Sato; Daniel P. Glavin; Jason P. Dworkin; Hiroshi Naraoka; Shogo Tachibana; Hisayoshi Yurimoto; Tomoki Nakamura; Takaaki Noguchi; Ryuji Okazaki; Hikaru Yabuta; Kanako Sakamoto; Toru Yada; Masahiro Nishimura; Aiko Nakato; Akiko Miyazaki; Kasumi Yogata; Masanao Abe; Tatsuaki Okada; Tomohiro Usui; Makoto Yoshikawa; Takanao Saiki; Satoshi Tanaka; Fuyuto Terui; Satoru Nakazawa; Sei-ichiro Watanabe; Yuichi Tsuda
Uracil in the carbonaceous asteroid (162173) Ryugu
Nature Communications, 21 Mar. 2023
14, 1

Hiroshi Naraoka; Yoshinori Takano; Jason P. Dworkin; Yasuhiro Oba; Kenji Hamase; Aogu Furusho; Nanako O. Ogawa; Minako Hashiguchi; Kazuhiko Fukushima; Dan Aoki; Philippe Schmitt-Kopplin; José C. Aponte; Eric T. Parker; Daniel P. Glavin; Hannah L. McLain; Jamie E. Elsila; Heather V. Graham; John M. Eiler; Francois-Regis Orthous-Daunay; Cédric Wolters; Junko Isa; Véronique Vuitton; Roland Thissen; Saburo Sakai; Toshihiro Yoshimura; Toshiki Koga; Naohiko Ohkouchi; Yoshito Chikaraishi; Haruna Sugahara; Hajime Mita; Yoshihiro Furukawa; Norbert Hertkorn; Alexander Ruf; Hisayoshi Yurimoto; Tomoki Nakamura; Takaaki Noguchi; Ryuji Okazaki; Hikaru Yabuta; Kanako Sakamoto; Shogo Tachibana; Harold C. Connolly; Dante S. Lauretta; Masanao Abe; Toru Yada; Masahiro Nishimura; Kasumi Yogata; Aiko Nakato; Miwa Yoshitake; Ayako Suzuki; Akiko Miyazaki; Shizuho Furuya; Kentaro Hatakeda; Hiromichi Soejima; Yuya Hitomi; Kazuya Kumagai; Tomohiro Usui; Tasuku Hayashi; Daiki Yamamoto; Ryota Fukai; Kohei Kitazato; Seiji Sugita; Noriyuki Namiki; Masahiko Arakawa; Hitoshi Ikeda; Masateru Ishiguro; Naru Hirata; Koji Wada; Yoshiaki Ishihara; Rina Noguchi; Tomokatsu Morota; Naoya Sakatani; Koji Matsumoto; Hiroki Senshu; Rie Honda; Eri Tatsumi; Yasuhiro Yokota; Chikatoshi Honda; Tatsuhiro Michikami; Moe Matsuoka; Akira Miura; Hirotomo Noda; Tetsuya Yamada; Keisuke Yoshihara; Kosuke Kawahara; Masanobu Ozaki; Yu-ichi Iijima; Hajime Yano; Masahiko Hayakawa; Takahiro Iwata; Ryudo Tsukizaki; Hirotaka Sawada; Satoshi Hosoda; Kazunori Ogawa; Chisato Okamoto; Naoyuki Hirata; Kei Shirai; Yuri Shimaki; Manabu Yamada; Tatsuaki Okada; Yukio Yamamoto; Hiroshi Takeuchi; Atsushi Fujii; Yuto Takei; Kento Yoshikawa; Yuya Mimasu; Go Ono; Naoko Ogawa; Shota Kikuchi; Satoru Nakazawa; Fuyuto Terui; Satoshi Tanaka; Takanao Saiki; Makoto Yoshikawa; Sei-ichiro Watanabe; Yuichi Tsuda
Soluble organic molecules in samples of the carbonaceous asteroid (162173) Ryugu
Science, 24 Feb. 2023
379, 6634

Yuta Isaji; Toshihiro Yoshimura; Daisuke Araoka; Minako Kurisu; Naohiko Ohkouchi
Method development of stable iron isotope analysis of heme
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2023
70, 176

Hiroto Kajita; Yuta Isaji; Rintaro Kato; Yoko Nishikura; Masafumi Murayama; Naohiko Ohkouchi; Shouye Yang; Hongbo Zheng; Ke Wang; Toshimichi Nakanishi; Takenori Sasak; Ayumi Maeda; Atsushi Suzuki; Toshiro Yamanaka; Hodaka Kawahata
Climatic change around the 4.2 ka event in coastal areas of the East China Sea and its potential influence on prehistoric Japanese people
Palaeogeography, Palaeoclimatology, Palaeoecology, Jan. 2023
609, 111310, 111310, 111310
[Reviewed]

Hidetaka Nomaki; Kento Kawatani; Yusuke Motomura; Akihiro Tame; Daisuke Uyeno; Nanako O. Ogawa; Naohiko Ohkouchi; Motohiro Shimanaga
Bacterivory of the hydrothermal-vent-specific copepod Stygiopontius senokuchiae (Dirivultidae, Siphonostomatoida) from copepodite through adult stages
Journal of the Marine Biological Association of the United Kingdom, Jan. 2023
103, e21, 1, 12
[Reviewed]

Toshihiro Yoshimura; Shigeyuki Wakaki; Nozomu Iwasaki; Tsuyoshi Ishikawa; Naohiko Ohkouchi
Stable Sr isotope (88Sr/86Sr) fractionation in calcite precious corals
Frontiers in Marine Science, 01 Dec. 2022
9

Hiroto Kajita; Tsutomu Nakazawa; Masayuki Utsunomiya; Naohiko Ohkouchi; Miyako Sato; Naomi Harada; Hodaka Kawahata
Long-chain alkenones in the Shimosa Group reveal palaeotemperatures of the Pleistocene interglacial Palaeo-Tokyo Bays
Progress in Earth and Planetary Science, Dec. 2022
9, 1

Ryuji Toue; Kazuhiko Fujita; Masashi Tsuchiya; Yoshito Chikaraishi; Yoko Sasaki; Naohiko Ohkouchi
Trophic niche separation of two non-spinose planktonic foraminifers Neogloboquadrina dutertrei and Pulleniatina obliquiloculata
Progress in Earth and Planetary Science, Dec. 2022
9, 1

Jun Matsubayashi; Katsuya Kimura; Naohiko Ohkouchi; Nanako O. Ogawa; Naoto F. Ishikawa; Yoshito Chikaraishi; Yuichi Tsuda; Hiroshi Minami
Using geostatistical analysis for simultaneous estimation of isoscapes and ontogenetic shifts in isotope ratios of highly migratory marine fish
Frontiers in Marine Science, 28 Nov. 2022
9

Kai Nils Nitzsche; Toshihiro Yoshimura; Naoto F. Ishikawa; Hiroto Kajita; Hodaka Kawahata; Nanako O. Ogawa; Katsuhiko Suzuki; Yusuke Yokoyama; Naohiko Ohkouchi
Metal contamination in a sediment core from Osaka Bay during the last 400 years
Progress in Earth and Planetary Science, 29 Oct. 2022
9, 1

Chisato Yoshikawa; Nanako O. Ogawa; Yoshito Chikaraishi; Akiko Makabe; Yohei Matsui; Yoshikazu Sasai; Masahide Wakita; Makio C. Honda; Yoshihisa Mino; Maki N. Aita; Tetsuichi Fujiki; Takuro Nunoura; Naomi Harada; Naohiko Ohkouchi
Nitrogen Isotopes of Sinking Particles Reveal the Seasonal Transition of the Nitrogen Source for Phytoplankton
Geophysical Research Letters, 16 Sep. 2022
49, 17

Takumi Tsutaya; Anna Wong; Peter T. Malim; Henry Bernard; Nanako O. Ogawa; Naohiko Ohkouchi; Shun Hongo; Tomoyuki Tajima; Tomoko Kanamori; Noko Kuze
Stable isotopic investigation of the feeding ecology of wild Bornean orangutans
American Journal of Biological Anthropology, 10 Aug. 2022
179, 2, 276, 290
[Reviewed]

Minako Hashiguchi; Dan Aoki; Kazuhiko Fukushima; Hiroshi Naraoka; Yoshinori Takano; Dworkin P. Jason; Aponte C. Jose; Elsila E. Jamie; Eiler M. John; Yoshihiro Furukawa; Aogu Furusho; Glavin P. Daniel; Heather V. Graham; Kenji Hamase; Hertkorn Norbert; Junko Isa; Toshiki Koga; McLain L. Hannah; Hajime Mita; Yasuhiro Oba; Nanako O. Ogawa; Naohiko Ohkouchi; Francois-Regis Orthous-Daunay; Eric T. Parker; Ruf Alexander; Saburo Sakaki; Schmitt-Kopplin Philippe; Haruna Sugahara; Thissen Roland; Vuitton Véronique; Cédric Wolters; Toshihiro Yoshimura; Hisayoshi Yurimoto; Tomoki Nakamura; Takaaki Noguchi; Ryuji Okazaki; Hikaru Yabuta; Kanako Sakamoto; Shogo Tachibana; Toru Yada; Masahiro Nishimura; Aiko Nakato; Akiko Miyazaki; Kasumi Yogata; Masanao Abe; Tomohiro Usui; Makoto Yoshikawa; Takanao Saiki; Satoshi Tanaka; Fuyuto Terui; Satoru Nakazawa; Sei-ichiro Watanabe; Yuichi Tsuda
The spatial distribution of soluble organic matter and its relationship to minerals in the asteroid (162173) Ryugu.
25 Jul. 2022

Naoto F. Ishikawa; Nanako O. Ogawa; Yuchen Sun; Yoshito Chikaraishi; Yoshinori Takano; Naohiko Ohkouchi
Integrative assessment of amino acid nitrogen isotontegrative assessment of amino acid nitrogen isotopic composition in biological tissue samples determined by GC/C/IRMS, LC × EA/IRMS, and LC × GC/C/IRMS
Limnology and Oceanography: Methods, 19 Jul. 2022
[Reviewed]

Atsushi Urai; Yoshinori Takano; Yohei Matsui; Hiroki Iwata; Yosuke Miyairi; Yusuke Yokoyama; Yuichi Miyabara; Naohiko Ohkouchi; Ho-Dong Park
Origin of Deep Methane from Active Faults along the Itoigawa–Shizuoka Tectonic Line between the Eurasian and North American Plates: ¹³C/¹²C and ¹⁴C/¹²C Methane Profiles from a Pull-Apart Basin at Lake Suwa
ACS Earth and Space Chemistry, 14 Jun. 2022

Yuta Isaji; C. Yoshikawa; N. O. Ogawa; K. Matsumoto; A. Makabe; S. Toyoda; N. F. Ishikawa; H. Ogawa; H. Saito; M. C. Honda; N. Ohkouchi
Nitrogen Sources for Phytoplankton in the Eastern Indian Ocean Determined From δ 15 N of Chlorophyll a and Divinylchlorophyll a
Geochemistry, Geophysics, Geosystems, Apr. 2022
23, 4

Naoto F. Ishikawa; Kazuaki Tadokoro; Jun Matsubayashi; Naohiko Ohkouchi
Biomass Pyramids of Marine Mesozooplankton Communities as Inferred From Their Integrated Trophic Positions
Ecosystems, 09 Mar. 2022

Yota Harada; Shin-ichi Ito; Nanako O. Ogawa; Chisato Yoshikawa; Naoto F. Ishikawa; Michio Yoneda; Naohiko Ohkouchi
Compound-Specific Nitrogen Isotope Analysis of Amino Acids in Eye Lenses as a New Tool to Reconstruct the Geographic and Trophic Histories of Fish
Frontiers in Marine Science, 03 Feb. 2022
8

Yoshimura Toshihiro; Qing Chang; Ohkouchi Naohiko; Ishitani Yoshiyuki; Dana Ulanova; Hirotoshi Endo; Kuroda Junichiro; Yurika Ujiie
Inter-chamber and -individual differences in trace elements to Ca ratios of planktonic foraminifera obtained from surface sediments
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2022
69, 211

Kai Nitzsche; Toshihiro Yoshimura; Naoto Ishikawa; Hiroto Kajita; Nanako Ogawa; Katz Suzuki; Naohiko Ohkouchi
Zinc stable isotopes as tracers for Zn pollution in sediment cores from historically polluted Lake Biwa and Osaka Bay
Goldschmidt2022 abstracts, 2022

Kan-Hsi Hsiung; Toshiya Kanamatsu; Ken Ikehara; Kazuko Usami; Chorng-Shern Horng; Naohiko Ohkouchi; Nanako O. Ogawa; Saneatsu Saito; Masafumi Murayama
X-ray fluorescence core scanning, magnetic signatures, and organic geochemistry analyses of Ryukyu Trench sediments: turbidites and hemipelagites
Progress in Earth and Planetary Science, 01 Dec. 2021
8, 1

Hidetaka Nomaki; Eugenio Rastelli; Nanako O. Ogawa; Yohei Matsui; Masashi Tsuchiya; Elisabetta Manea; Cinzia Corinaldesi; Miho Hirai; Naohiko Ohkouchi; Roberto Danovaro; Takuro Nunoura; Teresa Amaro
In situ experimental evidences for responses of abyssal benthic biota to shifts in phytodetritus compositions linked to global climate change
Global Change Biology, Dec. 2021
27, 23, 6139, 6155

Atsushi Urai; Makoto Matsushita; Ho-Dong Park; Hiroyuki Imachi; Miyuki Ogawara; Hiroki Iwata; Masanori Kaneko; Nanako O. Ogawa; Naohiko Ohkouchi; Yoshinori Takano
Detection of planktonic coenzyme factor 430 in a freshwater lake: small-scale analysis for probing archaeal methanogenesis
Progress in Earth and Planetary Science, Dec. 2021
8, 1

Hiroto Kajita; Ayumi Maeda; Masayuki Utsunomiya; Toshihiro Yoshimura; Naohiko Ohkouchi; Atsushi Suzuki; Hodaka Kawahata
Biomarkers in the rock outcrop of the Kazusa Group reveal palaeoenvironments of the Kuroshio region
Communications Earth & Environment, Dec. 2021
2, 1

Yoshihiro Fujiwara; Masaru Kawato; Jan Yde Poulsen; Hitoshi Ida; Yoshito Chikaraishi; Naohiko Ohkouchi; Kazumasa Oguri; Shinpei Gotoh; Genki Ozawa; Sho Tanaka; Masaki Miya; Tetsuya Sado; Katsunori Kimoto; Takashi Toyofuku; Shinji Tsuchida
Discovery of a colossal slickhead (Alepocephaliformes: Alepocephalidae): an active-swimming top predator in the deep waters of Suruga Bay, Japan
Scientific Reports, Dec. 2021
11, 1

Takumi Tsutaya; Nanako O. Ogawa; Toshiya Nomura; Mika Shimizu; Naohiko Ohkouchi; Noko Kuze
Carbon and nitrogen stable isotopic offsets between diet and hair/feces in captive orangutans
Primates, Nov. 2021
62, 6, 945, 954

Kai Nils Nitzsche; Toshihiro Yoshimura; Naoto F. Ishikawa; Nanako O. Ogawa; Katsuhiko Suzuki; Naohiko Ohkouchi
Trace metal geochemical and Zn stable isotope data as tracers for anthropogenic metal contributions in a sediment core from Lake Biwa, Japan
Applied Geochemistry, Nov. 2021
134, 105107, 105107

Junichiro Kuroda; Kyoko Hagino; Yoichi Usui; Paul R. Bown; Kan-Hsi Hsiung; Saburo Sakai; Ron Hackney; Saneatsu Saito; Masafumi Murayama; Takuto Ando; Naohiko Ohkouchi
Stratigraphy around the Cretaceous-Paleogene boundary in sediment cores from the Lord Howe Rise, Southwest Pacific
GSA Bulletin, 21 Sep. 2021

Masanori Kaneko; Yoshinori Takano; Masashi Kamo; Kazuya Morimoto; Takuro Nunoura; Naohiko Ohkouchi
Insights into the Methanogenic Population and Potential in Subsurface Marine Sediments Based on Coenzyme F430 as a Function-Specific Biomarker
JACS Au, 13 Sep. 2021

Christian Hallmann; Emmanuelle Grosjean; Nathan D. Shapiro; Yuichiro Kashiyama; Yoshito Chikaraishi; David A. Fike; Naohiko Ohkouchi; Roger E. Summons
Redox-Controlled Ammonium Storage and Overturn in Ediacaran Oceans
Frontiers in Earth Science, 10 Sep. 2021
9

Izumi Endo; Itsuki Sakon; Takashi Onaka; Yuki Kimura; Seiji Kimura; Setsuko Wada; L. Andrew Helton; Ryan M. Lau; Yoko Kebukawa; Yasuji Muramatsu; Nanako O. Ogawa; Naohiko Ohkouchi; Masato Nakamura; Sun Kwok
On the Nature of Organic Dust in Novae
The Astrophysical Journal, 01 Aug. 2021
917, 2, 103, 103
[Reviewed]

Toshihiro Yoshimura; Daisuke Araoka; Hodaka Kawahata; H. M. Zakir Hossain; Naohiko Ohkouchi
The Influence of Weathering, Water Sources, and Hydrological Cycles on Lithium Isotopic Compositions in River Water and Groundwater of the Ganges–Brahmaputra–Meghna River System in Bangladesh
Frontiers in Earth Science, 23 Jul. 2021
9

Hidetaka Nomaki; Eugenio Rastelli; Andreia Alves; Hisami Suga; Sandra Ramos; Tomo Kitahashi; Masashi Tsuchiya; Nanako O. Ogawa; Yohei Matsui; Koji Seike; Norio Miyamoto; Cinzia Corinaldesi; Elisabetta Manea; Naohiko Ohkouchi; Roberto Danovaro; Takuro Nunoura; Teresa Amaro
Abyssal fauna, benthic microbes, and organic matter quality across a range of trophic conditions in the western Pacific ocean
Progress in Oceanography, Jul. 2021
195, 102591, 102591

Naoto F. Ishikawa; Nanako O. Ogawa; Yoshito Chikaraishi; Moto-omi Yamaguchi; Katsunori Fujikura; Yosuke Miyairi; Yusuke Yokoyama; Toshi Nagata; Naohiko Ohkouchi
Influences of Ocean Currents on the Diets of Demersal Fish Communities in the Western North Pacific Revealed by Their Muscle Carbon and Nitrogen Isotopic Compositions
Frontiers in Marine Science, 05 May 2021
8

Shinya Yamamoto; Fumikatsu Nishizawa; Mitsuhiro Yoshimoto; Yosuke Miyairi; Yusuke Yokoyama; Hisami Suga; Naohiko Ohkouchi
Dating Lake Sediments Using Compound‐Specific 14 C Analysis of C 16 Fatty Acid: A Case Study From the Mount Fuji Volcanic Region, Japan
Geochemistry, Geophysics, Geosystems, May 2021
22, 5

Adam D. Sproson; Yoshinori Takano; Yosuke Miyairi; Takahiro Aze; Hiroyuki Matsuzaki; Naohiko Ohkouchi; Yusuke Yokoyama
Beryllium isotopes in sediments from Lake Maruwan Oike and Lake Skallen, East Antarctica, reveal substantial glacial discharge during the late Holocene
Quaternary Science Reviews, Mar. 2021
256, 106841, 106841

Toshihiro Yoshimura; Shigeyuki Wakaki; Hodaka Kawahata; H. M. Zakir Hossain; Takuya Manaka; Atsushi Suzuki; Tsuyoshi Ishikawa; Naohiko Ohkouchi
Stable Strontium Isotopic Compositions of River Water, Groundwater and Sediments From the Ganges–Brahmaputra–Meghna River System in Bangladesh
Frontiers in Earth Science, 26 Feb. 2021
9

Atsushi Urai; Yoshinori Takano; Hiroyuki Imachi; Shun'ichi Ishii; Yohei Matsui; Miyuki Ogawara; Eiji Tasumi; Yosuke Miyairi; Nanako O. Ogawa; Toshihiro Yoshimura; Fumio Inagaki; Yusuke Yokoyama; Kenjiro Kawano; Daisuke Murai; Ho Dong Park; Naohiko Ohkouchi
Origin of Deep Methane Associated with a Unique Community of Microorganisms in an Organic- And Iodine-Rich Aquifer
ACS Earth and Space Chemistry, 21 Jan. 2021
5, 1, 1, 11

Yoko Kebukawa; Michael E. Zolensky; Cyrena A. Goodrich; Motoo Ito; Nanako O. Ogawa; Yoshinori Takano; Naohiko Ohkouchi; Kento Kiryu; Motoko Igisu; Takazo Shibuya; Matthew A. Marcus; Takuji Ohigashi; James Martinez; Yu Kodama; Muawia H. Shaddad; Peter Jenniskens
Organic matter in carbonaceous chondrite lithologies of Almahata Sitta: Incorporation of previously unsampled carbonaceous chondrite lithologies into ureilitic regolith
Meteoritics and Planetary Science, 2021

Yoshinori Takano; Yasuhiro Oba; Satoshi Furota; Hiroshi Naraoka; Nanako Ogawa; Thomas M. Blattmann; Naohiko Ohkouchi
Analytical development of seamless procedures on cation-exchange chromatography and ion-pair chromatography with high-precision mass spectrometry for short-chain peptides
International Journal of Mass Spectrometry, Jan. 2021
116529, 116529

Toshihiro Yoshimura; Shigeyuki Wakaki; Tsuyoshi Ishikawa; Toshitaka Gamo; Daisuke Araoka; Naohiko Ohkouchi; Hodaka Kawahata
A Systematic Assessment of Stable Sr Isotopic Compositions of Vent Fluids in Arc/Back-Arc Hydrothermal Systems: Effects of Host Rock Type, Phase Separation, and Overlying Sediment
Frontiers in Earth Science, 03 Dec. 2020
8

Yuko Takizawa; Yoshinori Takano; Bohyung Choi; Prarthana S. Dharampal; Shawn A. Steffan; Nanako O. Ogawa; Naohiko Ohkouchi; Yoshito Chikaraishi
A new insight into isotopic fractionation associated with decarboxylation in organisms: implications for amino acid isotope approaches in biogeoscience
Progress in Earth and Planetary Science, Dec. 2020
7, 1

Yuchen Sun; Naoto F. Ishikawa; Nanako O. Ogawa; Hodaka Kawahata; Yoshinori Takano; Naohiko Ohkouchi
A method for stable carbon isotope measurement of underivatized individual amino acids by multi‐dimensional high‐performance liquid chromatography and elemental analyzer/isotope ratio mass spectrometry
Rapid Communications in Mass Spectrometry, 30 Oct. 2020
34, 20

Yuta Isaji; Nanako O. Ogawa; Yoshinori Takano; Naohiko Ohkouchi
Quantification and Carbon and Nitrogen Isotopic Measurements of Heme B in Environmental Samples
Analytical Chemistry, 18 Aug. 2020
92, 16, 11213, 11222

Naoto F. Ishikawa; Jacques C. Finlay; Hiromi Uno; Nanako O. Ogawa; Naohiko Ohkouchi; Ichiro Tayasu; Mary E. Power
Combined use of radiocarbon and stable carbon isotopes for the source mixing model in a stream food web
LIMNOLOGY AND OCEANOGRAPHY, Jul. 2020
[Reviewed]

Shinya Yamamoto; Yosuke Miyairi; Yusuke Yokoyama; Hisami Suga; Nanako O. Ogawa; Naohiko Ohkouchi
Compound-Specific Radiocarbon Analysis of Organic Compounds from Mount Fuji Proximal Lake (Lake Kawaguchi) Sediment, Central Japan
Radiocarbon, 01 Apr. 2020
62, 2, 439, 451

Jun Matsubayashi; Yutaka Osada; Kazuaki Tadokoro; Yoshiyuki Abe; Atsushi Yamaguchi; Kotaro Shirai; Kentaro Honda; Chisato Yoshikawa; Nanako O Ogawa; Naohiko Ohkouchi; Naoto F Ishikawa; Toshi Nagata; Hiroomi Miyamoto; Shigeto Nishino; Ichiro Tayasu
Tracking long-distance migration of marine fishes using compound-specific stable isotope analysis of amino acids.
Ecology letters, 24 Mar. 2020
[Reviewed]

Yuchen Sun; Naoto F. Ishikawa; Nanako O. Ogawa; Hodaka Kawahata; Yoshinori Takano; Naohiko Ohkouchi
High-precision compound-specific carbon isotopic analysis of underivatized amino acids using a multi-dimensional-HPLC and nano-EA/IRMS
23 Mar. 2020

Yoko Kebukawa; Michael E. Zolensky; Motoo Ito; Nanako O. Ogawa; Yoshinori Takano; Naohiko Ohkouchi; Aiko Nakato; Hiroki Suga; Yasuo Takeichi; Yoshio Takahashi; Kensei Kobayashi
Primordial organic matter in the xenolithic clast in the Zag H chondrite: Possible relation to D/P asteroids
Geochimica et Cosmochimica Acta, 15 Feb. 2020
271, 61, 77
[Reviewed]

Or M. Bialik; Gerald Auer; Nanako O. Ogawa; Dick Kroon; Nicolas D. Waldmann; Naohiko Ohkouchi
Monsoons, Upwelling, and the Deoxygenation of the Northwestern Indian Ocean in Response to Middle to Late Miocene Global Climatic Shifts
Paleoceanography and Paleoclimatology, 01 Feb. 2020
35, 2

Lindsay O. Prothro; Wojciech Majewski; Yusuke Yokoyama; Lauren M. Simkins; John B. Anderson; Masako Yamane; Yosuke Miyairi; Naohiko Ohkouchi
Timing and pathways of East Antarctic Ice Sheet retreat
QUATERNARY SCIENCE REVIEWS, Feb. 2020
230
[Reviewed]

Shinya Yamamoto; Yosuke Miyairi; Yusuke Yokoyama; Hisami Suga; Nanako O Ogawa; Naohiko Ohkouchi
Compound-specific radiocarbon analysis of organic compounds from Mount Fuji proximal lake (Lake Kawaguchi) sediment, central Japan　　　　　　　　　　　　　　　
Radiocarbon, 23 Jan. 2020
00, 00, 1, 13
[Reviewed]

Izumi Endo; Itsuki Sakon; Takashi Onaka; Andrew L. Helton; Ryan M. Lau; Seiji Kimura; Setsuko Wada; Nanako Ogawa; Naohiko Ohkouchi; Yoko Kebukawa
Quenched Nitrogen-included Carbonaceous Composite (QNCC): A powerful candidate of the carriers of the UIR bands in classical novae
Proceedings of the International Astronomical Union, 2020
425, 426

Isaji, Y.; Ogawa, N.O.; Boreham, C.J.; Kashiyama, Y.; Ohkouchi, N.
Evaluation of δ¹³C and δ¹⁵N Uncertainties Associated with the Compound-Specific Isotope Analysis of Geoporphyrins
Analytical Chemistry, 2020
92, 4
[Reviewed]

Matsumoto, Hironao; Kuroda, Junichiro; Coccioni, Rodolfo; Frontalini, Fabrizio; Sakai, Saburo; Ogawa, Nanako O.; Ohkouchi, Naohiko
Marine Os isotopic evidence for multiple volcanic episodes during Cretaceous Oceanic Anoxic Event 1b
Scientific Reports, 2020

D Xing; B Choi; Y Takizawa; R Fan; S Sugaya; M Tuchiya; N Ohkouchi; Y Chikaraishi
Trophic hierarchy of coastal marine fish communities viewed via compound-specific isotopic analysis of amino acids
Marine Ecology Progress Series, 2020

Hiroto Kajita; Hideto Nakamura; Naohiko Ohkouchi; Miyako Sato; Shun Tokioka; Hodaka Kawahata
Genomic and geochemical identification of the long-chain alkenone producers in the estuarine Lake Takahoko, Japan: Implications for temperature reconstructions
Organic Geochemistry, Jan. 2020
[Reviewed]

Yoshihiro Furukawa; Yoshito Chikaraishi; Naohiko Ohkouchi; Nanako O. Ogawa; Daniel P. Glavin; Jason P. Dworkin; Chiaki Abe; Tomoki Nakamura
Extraterrestrial ribose and other sugars in primitive meteorites
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Dec. 2019
116, 49, 24440, 24445
[Reviewed]

Sara K.E. Goulden; Naohiko Ohkouchi; Katherine H. Freeman; Yoshito Chikaraishi; Nanako O. Ogawa; Hisami Suga; Oliver Chadwick; Benjamin Z. Houlton
Strong correspondence between nitrogen isotope composition of foliage and chlorin across a rainfall gradient: Implications for paleo-reconstruction of the nitrogen cycle
Biogeosciences, 08 Oct. 2019
16, 19, 3869, 3882

Yamane Masako; Yokoyama Yusuke; Hirabayashi Shoko; Miyairi Yosuke; Ohkouchi Naohiko; Aze Takahiro
Small- to ultra-small-scale radiocarbon measurements using newly installed single-stage AMS at the University of Tokyo
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 15 Sep. 2019
455, 238, 243
[Reviewed]

Ogawa N. O; Kebukawa Y; Zolensky M; Takano Y; Ohkouchi N
ISOTOPIC MEASUREMENTS OF < 100 ng CARBON AND NITROGEN THROUGH EA/IRMS AND ITS APPLICATION TO EXTRATERRESTRIAL MATERIALS.
METEORITICS & PLANETARY SCIENCE, Aug. 2019
54
[Reviewed]

Takano Y; Furota S; Ogawa N. O; Ohkouchi N
ANALYTICAL DEVELOPMENT OF UNDERIVATIZED AMINO ACIDS AND SHORT-CHAIN PEPTIDE MOLECULES
METEORITICS & PLANETARY SCIENCE, Aug. 2019
54
[Reviewed]

Ayumi Maeda; Toshihiro Yoshimura; Daisuke Araoka; Atsushi Suzuki; Yusuke Tamenori; Kazuhiko Fujita; Takashi Toyofuku; Naohiko Ohkouchi; Hodaka Kawahata
Magnesium Isotopic Composition of Tests of Large Benthic Foraminifers: Implications for Biomineralization
Geochemistry, Geophysics, Geosystems, Aug. 2019
[Reviewed]

Nomaki Hidetaka; Uejima Yuki; Ogawa Nanako O; Yamane Masako; Watanabe Hiromi K; Senokuchi Reina; Bernhard Joan M; Kitahashi Tomo; Miyairi Yosuke; Yokoyama Yusuke; Ohkouchi Naohiko; Shimanaga Motohiro
Nutritional sources of meio- and macrofauna at hydrothermal vents and adjacent areas: natural-abundance radiocarbon and stable isotope analyses
MARINE ECOLOGY PROGRESS SERIES, 18 Jul. 2019
622, 49, 65
[Reviewed]

Yuta Isaji; Toshihiro Yoshimura; Daisuke Araoka; Junichiro Kuroda; Nanako O. Ogawa; Hodaka Kawahata; Naohiko Ohkouchi
Magnesium Isotope Fractionation during Synthesis of Chlorophyll a and Bacteriochlorophyll a of Benthic Phototrophs in Hypersaline Environments
ACS Earth and Space Chemistry, Jun. 2019
[Reviewed]

Isaji Yuta; Kawahata Hodaka; Takano Yoshinori; Ogawa Nanako O; Kuroda Junichiro; Yoshimura Toshihiro; Lugli Stefano; Manzi Vinicio; Roveri Marco; Ohkouchi Naohiko
Diazotrophy Drives Primary Production in the Organic-Rich Shales Deposited Under a Stratified Environment During the Messinian Salinity Crisis (Vena del Gesso, Italy)
FRONTIERS IN EARTH SCIENCE, 07 May 2019
7
[Reviewed]

Takeuchi Riko; Chikaraishi Yoshito; Ogawa Nanako O; Furota Satoshi; Ohkouchi Naohiko; Aoki Motohide; Uchida Tatsuya; Umemura Tomonari; Kumata Hidetoshi
Development of a Purification Method for Compound Specific Carbon Isotope Analysis of Phytosterols and Long-chain n-fatty Acids in Higher Plants
BUNSEKI KAGAKU, May 2019
68, 5, 297, 306
[Reviewed]

Yu Itahashi; Yilmaz Selim Erdal; Halil Tekin; Lubna Omar; Yutaka Miyake; Yoshito Chikaraishi; Naohiko Ohkouchi; Minoru Yoneda
Amino acid ¹⁵ N analysis reveals change in the importance of freshwater resources between the hunter-gatherer and farmer in the Neolithic upper Tigris
American Journal of Physical Anthropology, Apr. 2019
168, 4, 676, 686
[Reviewed]

Isaji Y; Kawahata H; Ogawa N. O; Kuroda J; Yoshimura T; Jimenez-Espejo F. J; Makabe A; Shibuya T; Lugli S; Santulli A; Manzi V; Roveri M; Ohkouchi N
Efficient recycling of nutrients in modern and past hypersaline environments
SCIENTIFIC REPORTS, 06 Mar. 2019
9
[Reviewed]

Izumi Endo; Itsuki Sakon; Takashi Onaka; Andrew L. Helton; Ryan M. Lau; Seiji Kimura; Setsuko Wada; Nanako Ogawa; Naohiko Ohkouchi; Yoko Kebukawa; Bruce G. Elmegreen; L. Viktor Tóth; Manuel Güdel
Nitrogen-included Carbonaceous Compounds (NCC): Laboratory-synthesized organics as the probable candidate for the carrier of the UIR bands observed in dusty classical novae
Proceedings of the International Astronomical Union, 2019
343, 344

Yoshinori Takano; Satoshi Furota; Nanako O. Ogawa; Naohiko Ohkouchi
Quest into peptide molecules: Unseen important targets in organic geochemistry
29th International Meeting on Organic Geochemistry, IMOG 2019, 2019

Y. Isaji; Y. Takano; N. O. Ogawa; N. Ohkouchi
Heme as one of the key molecules for constraining marine biogeochemical cycle　　　　　　　　　　　　　　　
29th International Meeting on Organic Geochemistry, IMOG 2019, 2019

A. Urai; Y. Takano; H. Imachi; S. Ishii; Y. Matsui; M. Ogawara; Y. Miyairi; N. O. Ogawa; T. Yoshimura; F. Inagaki; Y. Yokoyama; H. D. Park; D. Murai; K. Kawano; N. Ohkouchi
Deep methagenesis and iodine-rich aquifer: Insight from organic geochemical approach　　　　　　　　　　　　　　　
29th International Meeting on Organic Geochemistry, IMOG 2019, 2019

Itahashi, Yu; Erdal, Yilmaz Selim; Tekin, Halil; Omar, Lubna; Miyake, Yutaka; Chikaraishi, Yoshito; Ohkouchi, Naohiko; Yoneda, Minoru
Amino acid N analysis reveals change in the importance of freshwater resources between the hunter-gatherer and farmer in the Neolithic upper Tigris
American journal of physical anthropology, Jan. 2019
168, 4, 676, 686
[Reviewed]

Yoshimura Toshihiro; Kusaka Soichiro; Tamenori Yusuke; Araoka Daisuke; Kawahata Hodaka; Ohkouchi Naohiko
Micro distribution and chemical speciation of light elements in the Japanese Neolithic human teeth from the Inariyama Jomon site
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2019
66, 0, 266, 266

Isaji, Y; Yoshimura, T; Kuroda, J; Tamenori, Y; Jiménez-Espejo, F.J; Lugli, S; Manzi, V; Roveri, M; Kawahata, H; Ohkouchi, N
Biomarker records and mineral compositions of the Messinian halite and K–Mg salts from Sicily
Progress in Earth Planetary Science, 2019
6, 60
[Reviewed]

Wyatt, A.S.J; R. Matsumoto; Y. Chikaraishi; Y. Miyairi; Y. Yokoyama; K. Sato; N. Ohkouchi; T. Nagata
Enhancing insights into foraging specialization in the world’s largest fish using a multi-tissue, multi-isotope approach
Ecological Monographs, Jan. 2019
[Reviewed]

Sugahara, H.; Takano, Y.; Tachibana, S.; Sugawara, I.; Chikaraishi, Y.; Ogawa, N.O.; Ohkouchi, N.; Kouchi, A.; Yurimoto, H.
Molecular and isotopic compositions of nitrogen-containing organic molecules formed during UV-irradiation of simulated interstellar ice
Geochemical Journal, 2019
53, 1, 5, 20
[Reviewed]

I. Sakon; I. Endo; A. Ikeuchi; T. Onaka; Y. Kimura; S. Kimura; S. Wada; M. Nakamura; J. Ichimura; N. Ogawa; N. Ohkouchi; Y. Inatomi
Space Exposure Experiment of Carbonaceous Dust
Aeronautical and Space Sciences Japan, Dec. 2018
66, 12, 381, 387
[Reviewed]

Haruna Sugahara; Yoshinori Takano; Yuzuru Karouji; Kazuya Kumagai; Toru Yada; Naohiko Ohkouchi; Masanao Abe
Amino acids on witness coupons collected from the ISAS/JAXA curation facility for the assessment and quality control of the Hayabusa2 sampling procedure
Earth, Planets and Space, Dec. 2018
70, 1

Hiroto Kajita; Hodaka Kawahata; Ke Wang; Hongbo Zheng; Shouye Yang; Naohiko Ohkouchi; Masayuki Utsunomiya; Bin Zhoug; Bang Zheng
Extraordinary cold episodes during the mid-Holocene in the Yangtze delta: Interruption of the earliest rice cultivating civilization
Quaternary Science Reviews, Dec. 2018
[Reviewed]

Naoto F. Ishikawa; Yu Itahashi; Thomas M. Blattmann; Yoshinori Takano; Nanako O. Ogawa; Masako Yamane; Yusuke Yokoyama; Toshi Nagata; Minoru Yoneda; Negar Haghipour; Timothy I. Eglinton; Naohiko Ohkouchi
Improved Method for Isolation and Purification of Underivatized Amino Acids for Radiocarbon Analysis
Analytical Chemistry, 16 Oct. 2018
90, 20, 12035, 12041
[Reviewed]

Camuera Jon; Jimenez-Moreno Gonzalo; Ramos-Roman Maria J; Garcia-Alix Antonio; Toney Jaime L; Anderson R. Scott; Jimenez-Espejo Francisco; Kaufman Darrell; Bright Jordon; Webster Cole; Yanes Yurena; Carrion Jose S; Ohkouchi Naohiko; Suga Hisami; Yamame Masako; Yokoyama Yusuke; Martinez-Ruiz Francisca
Orbital-scale environmental and climatic changes recorded in a new similar to 200,000-year-long multiproxy sedimentary record from Padul, southern Iberian Peninsula
QUATERNARY SCIENCE REVIEWS, 15 Oct. 2018
198, 91, 114
[Reviewed]

Takano Yoshinori; Chikaraishi Yoshito; Imachi Hiroyuki; Miyairi Yosuke; Ogawa Nanako O; Kaneko Masanori; Yokoyama Yusuke; Krueger Martin; Ohkouchi Naohiko
Insight into anaerobic methanotrophy from C-13/C-12- amino acids and C-14/C-12-ANME cells in seafloor microbial ecology
SCIENTIFIC REPORTS, 24 Sep. 2018
8
[Reviewed]

Furota Satoshi; Ogawa Nanako O; Takano Yoshinori; Yoshimura Toshihiro; Ohkouchi Naohiko
Quantitative analysis of underivatized amino acids in the sub- to several-nanomolar range by ion-pair HPLC using a corona-charged aerosol detector (HPLC-CAD)
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES, 15 Sep. 2018
1095, 191, 197
[Reviewed]

Ishikawa Naoto F; Chikaraishi Yoshito; Takano Yoshinori; Sasaki Yoko; Takizawa Yuko; Tsuchiya Masashi; Tayasu Ichiro; Nagata Toshi; Ohkouchi Naohiko
A new analytical method for determination of the nitrogen isotopic composition of methionine: Its application to aquatic ecosystems with mixed resources
LIMNOLOGY AND OCEANOGRAPHY-METHODS, Sep. 2018
16, 9, 607, 620
[Reviewed]

Tsuchiya Masashi; Chikaraishi Yoshito; Nomaki Hidetaka; Sasaki Yoko; Tame Akihiro; Uematsu Katsuyuki; Ohkouchi Naohiko
Compound-specific isotope analysis of benthic foraminifer amino acids suggests microhabitat variability in rocky-shore environments
ECOLOGY AND EVOLUTION, Aug. 2018
8, 16, 8380, 8395
[Reviewed]

Tsuchiya M; Chikaraishi Y; Nomaki H; Sasaki Y; Tame A; Uematsu K; Ohkouchi N
Compound-specific isotope analysis of benthic foraminifer amino acids suggests microhabitat variability in rocky-shore environments　　　　　　　　　　　　　　　
Ecology and Evolution, Jul. 2018
00, 1, 16
[Reviewed]

Yoshikawa Chisato; Makabe Akiko; Matsui Yohei; Nunoura Takuro; Ohkouchi Naohiko
Nitrate Isotope Distribution in the Subarctic and Subtropical North Pacific
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, Jul. 2018
19, 7, 2212, 2224
[Reviewed]

Yasuhito Sekine; Kenya Kodama; Takamichi Kobayashi; Seiji Obata; Yu Chang; Nanako O. Ogawa; Yoshinori Takano; Naohiko Ohkouchi; Koichiro Saiki; Toshimori Sekine
An experimental study on impact-induced alterations of planetary organic simulants
Meteoritics and Planetary Science, 01 Jun. 2018
53, 6, 1267, 1282
[Reviewed]

Francisco J. Jimenez-Espejo; Antonio García-Alix; Naomi Harada; André Bahr; Saburo Sakai; Koichi Iijima; Qing Chang; Keiko Sato; Katsuhiko Suzuki; Naohiko Ohkouchi
Changes in detrital input, ventilation and productivity in the central Okhotsk Sea during the marine isotope stage 5e, penultimate interglacial period
Journal of Asian Earth Sciences, 01 May 2018
156, 189, 200
[Reviewed]

Yusuke Kondo; Shoma Okada; Susumu Ohtsuka; Takeshi Hirabayashi; Aya Adachi; Makoto Urata; Sho Toshino; Hiroshi Miyake; Nanako O. Ogawa; Naohiko Ohkouchi
Piscivory of the Japanese giant box jellyfish Morbakka virulenta
PLANKTON & BENTHOS RESEARCH, May 2018
13, 2, 66, 74
[Reviewed]

Yuichi I. Naito; Yoshito Chikaraishi; Dorothée G. Drucker; Naohiko Ohkouchi; Patrick Semal; Christoph Wißing; Hervé Bocherens
Reply to “Comment on “Ecological niche of Neanderthals from Spy Cave revealed by nitrogen isotopes of individual amino acids in collagen.” [J. Hum. Evol. 93 (2016) 82–90]” [J. Hum. Evol. 117 (2018) 53–55]
Journal of Human Evolution, 01 Apr. 2018
117, 56, 60
[Reviewed]

Takuro Nunoura; Yoshito Chikaraishi; Rikihisa Izaki; Takashi Suwa; Takaaki Sato; Takeshi Harada; Koji Mori; Yumiko Kato; Masayuki Miyazaki; Shigeru Shimamura; Katsunori Yanagawa; Aya Shuto; Naohiko Ohkouchi; Nobuyuki Fujita; Yoshihiro Takaki; Haruyuki Atomi; Ken Takai
A primordial and reversible TCA cycle in a facultatively chemolithoautotrophic thermophile.
Science (New York, N.Y.), 02 Feb. 2018
359, 6375, 559, 563
[Reviewed]

Yu Itahashi; Akira Tsuneki; Sean P. Dougherty; Yoshito Chikaraishi; Naohiko Ohkouchi; Minoru Yoneda
Dining together: Reconstruction of Neolithic food consumption based on the δ¹⁵N values for individual amino acids at Tell el-Kerkh, northern Levant
Journal of Archaeological Science: Reports, Feb. 2018
17, 775, 784
[Reviewed]

Toshihiro Yoshimura; Daisuke Araoka; Yusuke Tamenori; Junichiro Kuroda; Hodaka Kawahata; Naohiko Ohkouchi
Lithium, magnesium and sulfur purification from seawater using an ion chromatograph with a fraction collector system for stable isotope measurements
Journal of Chromatography A, 05 Jan. 2018
1531, 157, 162
[Reviewed]

Yoshimura Toshihiro; Araoka Daisuke; Kuroda Junichiro; Isaji Yuta; Kawahata Hodaka; Ohkouchi Naohiko
Chemical variations of major elements during the evaporation of seawater, and reconstruction of the evaporative concentration process in the Mediterranean basins in Late Miocene time by Mg isotope rat
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2018
65, 0, 195, 195

Urai Atsushi; Yokoyama Yusuke; Murai Daisuke; Kawano Kenjiro; Ohkouchi Naohiko; Takano Yoshinori; Ishii Shunichi; Imachi Hiroyuki; Matsui Yohei; Miyairi Yosuke; Ogawa Nanako; Yoshimura Toshihiro; Inagaki Fumio
Deep methanogenesis and iodine aquifer: an organic geochemical approach
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2018
65, 0, 177, 177

Ogawa Nanako O; Ohkouchi Naohiko; Nomaki Hidetaka; Chikaraishi Yoshito; Fujikura Katsunori; Kitazato Hiroshi
Polychlorinated biphenyls (PCBs) in deep-sea organisms and sediments off Tohoku after the Great East Japan Earthquake in 2011
NIPPON SUISAN GAKKAISHI, 2018
84, 5, 897, 900
[Reviewed]

Naeher, S; Ohkouchi, N
Pigmente - Indikatoren für Umweltveränderungen.
Nachrichten aus der Chemie, 2018
65, 1, 16, 20
[Reviewed]

Gueneli, N; McKenna, A.M; Ohkouchi, N; Boreham, C.J; Beghin, J; Javaux, E.J; Brocks, J.J
1.1-billion-year-old porphyrins establish a marine ecosystem dominated by bacterial primary producers.
Proceedings of the National Academy of Sciences of the United States of America, 2018
115, 30, 6978, 6986
[Reviewed]

Kazuhiro Kobayashi; Masaharu Tanaka; Yoichi Yatsukawa; Soichi Tanabe; Mitsuru Tanaka; Naohiko Ohkouchi
Development of a method to isolate glutamic acid from foodstuffs for a precise determination of their stable carbon isotope ratio
Analytical Sciences, 2018
34, 5, 571, 574
[Reviewed]

Akiko S. Goto; Kasumi Miura; Takashi Korenaga; Takashi Hasegawa; Naohiko Ohkouchi; Yoshito Chikaraishi
Fractionation of stable nitrogen isotopes (15N/14N) during enzymatic deamination of glutamic acid: Implications for mass and energy transfers in the biosphere
Geochemical Journal, 2018
52, 3, 273, 280
[Reviewed]

Saburo Sakai; Shinichi Matsuda; Toshihide Hikida; Akio Shimono; J. Barry McManus; Mark Zahniser; David Nelson; David L. Dettman; Danzhou Yang; Naohiko Ohkouchi
High-Precision Simultaneous O-18/O-16, C-13/C-12, L and O-17/O-16 Analyses for Microgram Quantities of CaCO3 by Tunable Infrared Laser Absorption Spectroscopy
ANALYTICAL CHEMISTRY, Nov. 2017
89, 21, 11846, 11852
[Reviewed]

Kiyotaka Takishita; Yoshito Chikaraishi; Goro Tanifuji; Naohiko Ohkouchi; Tetsuo Hashimoto; Katsunori Fujikura; Andrew J. Roger
Microbial Eukaryotes that Lack Sterols
JOURNAL OF EUKARYOTIC MICROBIOLOGY, Nov. 2017
64, 6, 897, 900
[Reviewed]

Naohiko Ohkouchi; Yoshito Chikaraishi; Hilary G. Close; Brian Fry; Thomas Larsen; Daniel J. Madigan; Matthew D. McCarthy; Kelton W. McMahon; Toshi Nagata; Yuichi I. Naito; Nanako O. Ogawa; Brian N. Popp; Shawn Steffan; Yoshinori Takano; Ichiro Tayasu; Alex S. J. Wyatt; Yasuhiko T. Yamaguchi; Yusuke Yokoyama
Advances in the application of amino acid nitrogen isotopic analysis in ecological and biogeochemical studies
ORGANIC GEOCHEMISTRY, Nov. 2017
113, 150, 174
[Reviewed]

Caitlin J. Campbell; David M. Nelson; Nanako O. Ogawa; Yoshito Chikaraishi; Naohiko Ohkouchi
Trophic position and dietary breadth of bats revealed by nitrogen isotopic composition of amino acids
SCIENTIFIC REPORTS, Nov. 2017
7
[Reviewed]

Yasuhiko T. Yamaguchi; Yoshito Chikaraishi; Yoshinori Takano; Nanako O. Ogawa; Hiroyuki Imachi; Yusuke Yokoyama; Naohiko Ohkouchi
Fractionation of nitrogen isotopes during amino acid metabolism in heterotrophic and chemolithoautotrophic microbes across Eukarya, Bacteria, and Archaea: Effects of nitrogen sources and metabolic pathways
ORGANIC GEOCHEMISTRY, Sep. 2017
111, 101, 112
[Reviewed]

Bohyung Choi; Sun-Yong Ha; Jae Seong Lee; Yoshito Chikaraishi; Naohiko Ohkouchi; Kyung-Hoon Shin
Trophic interaction among organisms in a seagrass meadow ecosystem as revealed by bulk δ13C and amino acid δ15N analyses
Limnology and Oceanography, 01 Jul. 2017
62, 4, 1426, 1435
[Reviewed]

Yuta Isaji; Hodaka Kawahata; Junichiro Kuroda; Toshihiro Yoshimura; Nanako O. Ogawa; Atsushi Suzuki; Takazo Shibuya; Francisco J. Jimenez-Espejo; Stefano Lugli; Andrea Santulli; Vinicio Manzi; Marco Roveri; Naohiko Ohkouchi
Biological and physical modification of carbonate system parameters along the salinity gradient in shallow hypersaline solar salterns in Trapani, Italy
GEOCHIMICA ET COSMOCHIMICA ACTA, Jul. 2017
208, 354, 367
[Reviewed]

Bohyung Choi; Sun-Yong Ha; Jae Seong Lee; Yoshito Chikaraishi; Naohiko Ohkouchi; Kyung-Hoon Shin
Trophic interaction among organisms in a seagrass meadow ecosystem as revealed by bulk delta C-13 and amino acid delta N-15 analyses
LIMNOLOGY AND OCEANOGRAPHY, Jul. 2017
62, 4, 1426, 1435
[Reviewed]

Dorothee G. Drucker; Yuichi I. Naito; Stephane Pean; Sandrine Prat; Laurent Crepin; Yoshito Chikaraishi; Naohiko Ohkouchi; Simon Puaud; Martina Laznickova-Galetova; Marylene Patou-Mathis; Aleksandr Yanevich; Herve Bocherens
Isotopic analyses suggest mammoth and plant in the diet of the oldest anatomically modern humans from far southeast Europe
SCIENTIFIC REPORTS, Jul. 2017
7
[Reviewed]

Keigo Kinoshita; Yoshinori Takano; Naohiko Ohkouchi; Shigeru Deguchi
Free-Radical Polymerization of Acrylic Acid under Extreme Reaction Conditions Mimicking Deep-Sea Hydrothermal Vents
ACS Omega, 30 Jun. 2017
2, 6, 2765, 2769
[Reviewed]

Yu Itahashi; Yutaka Miyake; Osamu Maeda; Osamu Rondo; Hitomi Hongo; Wim Van Neer; Yoshito Chikaraishi; Naohiko Ohkouchi; Minoru Yoneda
Preference for fish in a Neolithic hunter-gatherer community of the upper Tigris, elucidated by amino acid delta N-15 analysis
JOURNAL OF ARCHAEOLOGICAL SCIENCE, Jun. 2017
82, 40, 49
[Reviewed]

Takishita, Kiyotaka; Chikaraishi, Yoshito; Tanifuji, Goro; Ohkouchi, Naohiko; Hashimoto, Tetsuo; Fujikura, Katsunori; Roger, Andrew J
Microbial Eukaryotes that Lack Sterols
The Journal of eukaryotic microbiology, May 2017
64, 6, 897, 900
[Reviewed]

Yuko Takizawa; Prarthana S. Dharampal; Shawn A. Steffan; Yoshinori Takano; Naohiko Ohkouchi; Yoshito Chikaraishi
Intra-trophic isotopic discrimination of N-15/N-14 for amino acids in autotrophs: Implications for nitrogen dynamics in ecological studies
ECOLOGY AND EVOLUTION, May 2017
7, 9, 2916, 2924
[Reviewed]

Kiyotaka Takishita; Yoshihiro Takaki; Yoshito Chikaraishi; Tetsuro Ikuta; Genki Ozawa; Takao Yoshida; Naohiko Ohkouchi; Katsunori Fujikura
Genomic Evidence that Methanotrophic Endosymbionts Likely Provide Deep-Sea Bathymodiolus Mussels with a Sterol Intermediate in Cholesterol Biosynthesis
GENOME BIOLOGY AND EVOLUTION, May 2017
9, 5, 1148, 1160
[Reviewed]

Shawn A. Steffan; Yoshito Chikaraishi; Prarthana S. Dharampal; Jonathan N. Pauli; Christelle Guedot; Naohiko Ohkouchi
Unpacking brown food-webs: Animal trophic identity reflects rampant microbivory
ECOLOGY AND EVOLUTION, May 2017
7, 10, 3532, 3541
[Reviewed]

Naoto F. Ishikawa; Yoshito Chikaraishi; Naohiko Ohkouchi; Aya R. Murakami; Ichiro Tayasu; Hiroyuki Togashi; Jun-ichi Okano; Yoichiro Sakai; Tomoya Iwata; Michio Kondoh; Noboru Okuda
Integrated trophic position decreases in more diverse communities of stream food webs
SCIENTIFIC REPORTS, May 2017
7
[Reviewed]

Toshihiro Yoshimura; Yusuke Tamenori; Atsushi Suzuki; Hodaka Kawahata; Nozomu Iwasaki; Hiroshi Hasegawa; Luan T. Nguyen; Azumi Kuroyanagi; Toshitsugu Yamazaki; Junichiro Kuroda; Naohiko Ohkouchi
Altervalent substitution of sodium for calcium in biogenic calcite and aragonite
GEOCHIMICA ET COSMOCHIMICA ACTA, Apr. 2017
202, 21, 38
[Reviewed]

Branwen Williams; Benoit Thibodeau; Yoshito Chikaraishi; Naohiko Ohkouchi; Andrew Walnum; Andréa G. Grottoli; Patrick L. Colin
Consistency in coral skeletal amino acid composition offshore of Palau in the western Pacific warm pool indicates no impact of decadal variability in nitricline depth on primary productivity
Limnology and Oceanography, 01 Mar. 2017
62, 2, 399, 407
[Reviewed]

Naoto F. Ishikawa; Fumio Hayashi; Yoko Sasaki; Yoshito Chikaraishi; Naohiko Ohkouchi
Trophic discrimination factor of nitrogen isotopes within amino acids in the dobsonfly Protohermes grandis (Megaloptera: Corydalidae) larvae in a controlled feeding experiment
ECOLOGY AND EVOLUTION, Mar. 2017
7, 6, 1674, 1679
[Reviewed]

Branwen Williams; Benoit Thibodeau; Yoshito Chikaraishi; Naohiko Ohkouchi; Andrew Walnum; Andrea G. Grottoli; Patrick L. Colin
Consistency in coral skeletal amino acid composition offshore of Palau in the western Pacific warm pool indicates no impact of decadal variability in nitricline depth on primary productivity
LIMNOLOGY AND OCEANOGRAPHY, Mar. 2017
62, 2, 399, 407
[Reviewed]

Haruna Sugahara; Yoshinori Takano; Nanako O. Ogawa; Yoshito Chikaraishi; Naohiko Ohkouchi
Nitrogen Isotopic Fractionation in Ammonia during Adsorption on Silicate Surfaces
ACS EARTH AND SPACE CHEMISTRY, Mar. 2017
1, 1, 24, 29
[Reviewed]

Furota Satoshi; O. Ogawa Nanako; Takano Yoshinori; Ohkouchi Naohiko
A highly sensitive method for quantification of underivatized amino acids by HPLC-CAD
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2017
64, 80, 80

O. Ogawa Nanako; Yoshikawa Chisato; Hisami Suga; Makabe Akiko; Matsui Yohei; Kawagucci Shinsuke; Fujiki Tetsuichi; Harada Naomi; Ohkouchi Naohiko
Nitrogen isotopic composition of chlorophylls to reconstruct photosynthetic nitrogen cycle in the ocean
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2017
64, 13, 13

Isaji Yuta; Takano Yoshinori; Ijiri Akira; Kuroda Junichiro; Yoshimura Toshihiro; J. Jimenez―Espejo Francisco; Lugli Stefano; Inagaki Fumio; Manzi Vinicio; Roveri Marco; Kawahata Hodaka; Ohkouchi Naohiko
Identification of the fossil microorganisms preserved in ancient gypsum rocks by using MALDI-TOF/MS imaging method
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2017
64, 211, 211

Takano Yoshinori; Isaji Yuta; Yamada Keita; Tachibana Shogo; Ijiri Akira; Ohkouchi Naohiko
Imaging analysis for organic molecules through the non-destructive, semi-destructive, and destructive seamless analysis of carbonaceous samples
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2017
64, 213, 213

Yoshikawa Chisato; Chikamoto Megumi; Etourneau Johan; Crosta Xavier; O. Nanako Ogawa; Naohiko Ohkouchi
An insight into the changes in surface nitrogen cycle in the Antarctic marginal sea over the past 2000 years based on a nitrogen isotopic model
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2017
64, 12, 12

Yoshimura Toshihiro; Wakaki Shigeyuki; Kuroda Junichiro; Ishikawa Tsuyoshi; Ohkouchi Naohiko
Changes in the chemical weathering and sedimentation of carbonates during the Quaternary deduced from the 88Sr/86Sr record
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2017
64, 7, 7

OHKOUCHI Naohiko
化合物レベル放射性炭素年代法
Geochemistry, 2017
51, 3, 135, 152
[Reviewed]

Makiko Ishikawa; Nanako O. Ogawa; Naohiko Ohkouchi; Daniel Edison M. Husana; Tomoki Kase
Stable carbon isotope compositions of foot tissue, conchiolin opercula, and organic matrix within the shells of two marine gastropods from a seagrass meadow in the Philippines
GEOCHEMICAL JOURNAL, 2017
51, 3
[Reviewed]

Sebastian Naeher; Hisami Suga; Nanako O. Ogawa; Yoshinori Takano; Carsten J. Schubert; Kliti Grice; Naohiko Ohkouchi
Distributions and compound-specific isotopic signatures of sedimentary chlorins reflect the composition of photoautotrophic communities and their carbon and nitrogen sources in Swiss lakes and the Black Sea
CHEMICAL GEOLOGY, Dec. 2016
443, 198, 209
[Reviewed]

Sebastian Naeher; Hisami Suga; Nanako O. Ogawa; Carsten J. Schubert; Kliti Grice; Naohiko Ohkouchi
Compound-specific carbon and nitrogen isotopic compositions of chlorophyll a and its derivatives reveal the eutrophication history of Lake Zurich (Switzerland)
CHEMICAL GEOLOGY, Dec. 2016
443, 210, 219
[Reviewed]

Sebastian Naeher; Hisami Suga; Nanako O. Ogawa; Carsten J. Schubert; Kliti Grice; Naohiko Ohkouchi
Compound-specific carbon and nitrogen isotopic compositions of chlorophyll a and its derivatives reveal the eutrophication history of Lake Zurich (Switzerland)
Chemical Geology, 21 Nov. 2016
441, 138, 147
[Reviewed]

Els E. van Soelen; Naohiko Ohkouchi; Hisami Suga; Jaap S. Sinninghe Damste; Gert-Jan Reichart
A late Holocene molecular hydrogen isotope record of the East Asian Summer Monsoon in Southwest Japan
QUATERNARY RESEARCH, Nov. 2016
86, 3, 287, 294
[Reviewed]

Naohiko Ohkouchi; H. Shibata; Y. Chikaraishi; H. Nomaki; N. O. Ogawa; T. Nagata; T. Goto; K. Fujikura; H. Kitazato
A monitoring result of polychlorinated biphenyls (PCBs) in deep-sea organisms and sediments off Tohoku during 2012-2014: temporal variation and the relationship with the trophic position
JOURNAL OF OCEANOGRAPHY, Aug. 2016
72, 4, 629, 639
[Reviewed]

Yuichi I. Naito; Mietje Germonpre; Yoshito Chikaraishi; Naohiko Ohkouchi; Dorothee G. Drucker; Keith A. Hobson; Mark A. Edwards; Christoph Wissing; Herve Bocherens
Evidence for herbivorous cave bears (Ursus spelaeus) in Goyet Cave, Belgium: implications for palaeodietary reconstruction of fossil bears using amino acid N-15 approaches
JOURNAL OF QUATERNARY SCIENCE, Aug. 2016
31, 6, 598, 606
[Reviewed]

Fumio Inagaki; Kai-Uwe Hinrichs; Yusuke Kubo; Monika Bihan; Stephen A. Bowden; Marshall Bowles; Marcus Elvert; Clemens Glombitza; Doris Gross; Guy J. Harrington; Verena Heuer; Wei Li Hong; Tomoyuki Hori; Tatsuhiko Hoshino; Akira Ijiri; Hiroyuki Imachi; Motoo Ito; Masanori Kaneko; Mark A. Lever; Kevin Li; David Limmer; Yu Shih Lin; Chang Hong Liu; Barbara A. Methé; Sumito Morita; Yuki Morono; Masafumi Murayama; Naohiko Ohkouchi; Shuhei Ono; Young Soo Park; Stephen C. Phillips; Xavier Prieto-Mollar; Marcella Purkey; Natascha Riedinger; Yoshinori Sanada; Justine Sauvage; Glen Snyder; Rita Susilawati; Yoshinori Takano; Wataru Tanikawa; Eiji Tasumi; Takeshi Terada; Hitoshi Tomaru; Elizabeth Trembath-Reichert; David T. Wang; Yasuhiro Yamada
IODP Expedition 337: Deep Coalbed Biosphere off Shimokita - Microbial processes and hydrocarbon system associated with deeply buried coalbed in the ocean
Scientific Drilling, Jun. 2016
21, 17, 28
[Reviewed]

Chisato Yoshikawa; Hitomi Abe; Maki N. Aita; Florian Breider; Keichi Kuzunuki; Sakae Toyoda; Nanako O. Ogawa; Hisami Suga; Naohiko Ohkouchi; Sebastian O. Danielache; Masahide Wakita; Makio C. Honda; Naohiro Yoshida
Insight into nitrous oxide production processes in the western North Pacific based on a marine ecosystem isotopomer model
JOURNAL OF OCEANOGRAPHY, Jun. 2016
72, 3, 491, 508
[Reviewed]

Ishikawa, N.F; Togashi, H; Kato, Y; Yoshimura, M; Kohmatsu, Y; Yoshimizu, C; Ogawa, N.O; Ohte, N; Tokuchi, N; Ohkouchi, N; Tayasu, I
Terrestrial-aquatic linkage in stream food webs along a forest chronosequence: multi-isotopic evidence
Ecology, May 2016
97, 5, 1146, 1158
[Reviewed]

Naoto F. Ishikawa; Hiroyuki Togashi; Yoshikazu Kato; Mayumi Yoshimura; Yukihiro Kohmatsu; Chikage Yoshimizu; Nanako O. Ogawa; Nobuhito Ohte; Naoko Tokuchi; Naohiko Ohkouchi; Ichiro Tayasu
Terrestrial-aquatic linkage in stream food webs along a forest chronosequence: multi-isotopic evidence
ECOLOGY, May 2016
97, 5, 1146, 1158
[Reviewed]

Yuichi I. Naito; Yoshito Chikaraishi; Dorothee G. Drucker; Naohiko Ohkouchi; Patrick Semal; Christoph Wissing; Herve Bocherens
Ecological niche of Neanderthals from Spy Cave revealed by nitrogen isotopes of individual amino acids in collagen
JOURNAL OF HUMAN EVOLUTION, Apr. 2016
93, 82, 90
[Reviewed]

Yusuke Kondo; Susumu Ohtsuka; Takeshi Hirabayashi; Shoma Okada; Nanako O. Ogawa; Naohiko Ohkouchi; Takeshi Shimazu; Jun Nishikawa
Seasonal changes in infection with trematode species utilizing jellyfish as hosts: evidence of transmission to definitive host fish via medusivory
PARASITE, Apr. 2016
23
[Reviewed]

Toshihiro Yoshimura; Junichiro Kuroda; Stefano Lugli; Yusuke Tamenori; Nanako O. Ogawa; Francisco J. Jimenez-Espejo; Yuta Isaji; Marco Roveri; Vinicio Manzi; Hodaka Kawahata; Naohiko Ohkouchi
An X-ray spectroscopic perspective on Messinian evaporite frm SU cUUy: Sedimentary fabrics, element distributions, and chemical environments of S and Mg
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, Apr. 2016
17, 4, 1383, 1400
[Reviewed]

Yuichi I. Naito; Hervé Bocherens; Yoshito Chikaraishi; Dorothée G. Drucker; Christoph Wißing; Minoru Yoneda; Naohiko Ohkouchi
An overview of methods used for the detection of aquatic resource consumption by humans: Compound-specific delta N-15 analysis of amino acids in archaeological materials
Journal of Archaeological Science: Reports, Apr. 2016
6, 720, 732
[Reviewed]

Yusuke Yokoyama; John B. Anderson; Masako Yamane; Lauren M. Simkins; Yosuke Miyairi; Takahiro Yamazaki; Mamito Koizumi; Hisami Suga; Kazuya Kusahara; Lindsay Prothro; Hiroyasu Hasumi; John R. Southon; Naohiko Ohkouchi
Widespread collapse of the Ross Ice Shelf during the late Holocene
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Mar. 2016
113, 9, 2354, 2359
[Reviewed]

B. R. Kruger; J. P. Werne; D. K. Branstrator; T. R. Hrabik; Y. Chikaraishi; N. Ohkouchi; E. C. Minor
Organic matter transfer in Lake Superior's food web: Insights from bulk and molecular stable isotope and radiocarbon analyses
Limnology and Oceanography, 01 Jan. 2016
61, 1, 149, 164
[Reviewed]

Katsunori Fujikura; Yoshihiro Fujiwara; Yoshimi Takahashi; Naohiko Ohkouchi; Hiroshi Kitazato
Debris by the huge Tsunami triggered by the Great East Japan Earthquake, Impact on the marine ecosystem
Nippon Suisan Gakkaishi (Japanese Edition), 2016
82, 2, 136
[Reviewed]

高野 淑識; 力石 嘉人; 大河内 直彦
アミノ酸（ピバロイル/ イソブチルエステル誘導体）のGC/MS による解析
Researches in Organic Geochemistry, 2016
32, 1, 1, 18
[Reviewed]

B. R. Kruger; J. P. Werne; D. K. Branstrator; T. R. Hrabik; Y. Chikaraishi; N. Ohkouchi; E. C. Minor
Organic matter transfer in Lake Superior's food web: Insights from bulk and molecular stable isotope and radiocarbon analyses
LIMNOLOGY AND OCEANOGRAPHY, Jan. 2016
61, 1, 149, 164
[Reviewed]

Queenie Hoi Shan Chan; Yoshito Chikaraishi; Yoshinori Takano; Nanako O. Ogawa; Naohiko Ohkouchi
Amino acid compositions in heated carbonaceous chondrites and their compound-specific nitrogen isotopic ratios
EARTH PLANETS AND SPACE, Jan. 2016
68
[Reviewed]

Junichiro Kuroda; Francisco J. Jimenez-Espejo; Tatsuo Nozaki; Rocco Gennari; Stefano Lugli; Vinicio Manzi; Marco Roveri; Rachel Flecker; Francisco J. Sierro; Toshihiro Yoshimura; Katsuhiko Suzuki; Naohiko Ohkouchi
Miocene to Pleistocene osmium isotopic records of the Mediterranean sediments
PALEOCEANOGRAPHY, Jan. 2016
31, 1, 148, 166
[Reviewed]

Masanori Kaneko; Yoshinori Takano; Nanako O. Ogawa; Yuki Sato; Naohiro Yoshida; Naohiko Ohkouchi
Estimation of methanogenesis by quantification of coenzyme F430 in marine sediments
GEOCHEMICAL JOURNAL, 2016
50, 6, 453, 460
[Reviewed]

Shawn A. Steffan; Yoshito Chikaraishi; David R. Horton; Eugene Miliczky; Juan E. Zalapa; Vincent P. Jones; Naohiko Ohkouchi
Beneficial or not? Decoding carnivore roles in plant protection
BIOLOGICAL CONTROL, Dec. 2015
91, 34, 41
[Reviewed]

Shawn A. Steffan; Yoshito Chikaraishi; Cameron R. Currie; Heidi Horn; Hannah R. Gaines-Day; Jonathan N. Pauli; Juan E. Zalapa; Naohiko Ohkouchi
Microbes are trophic analogs of animals
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Dec. 2015
112, 49, 15119, 15124
[Reviewed]

Hidetaka Nomaki; Yoshito Chikaraishi; Masashi Tsuchiya; Takashi Toyofuku; Hisami Suga; Yoko Sasaki; Katsuyuki Uematsu; Akihiro Tame; Naohiko Ohkouchi
Variation in the nitrogen isotopic composition of amino acids in benthic foraminifera: Implications for their adaptation to oxygen-depleted environments
LIMNOLOGY AND OCEANOGRAPHY, Nov. 2015
60, 6, 1906, 1916
[Reviewed]

Shunsaku Miyachi; Takeyuki Mayahara; Kouji Tsushima; Katsuhiro Sasada; Eiichi Kohno; Nanako O. Ogawa; Yoshito Chikaraishi; Naohiko Ohkouchi
Approach to determine individual trophic level and the difference in food sources of Japanese anchovy Engraulis japonicus in Sagami Bay, based on compound-specific nitrogen stable isotope analysis of amino acids
FISHERIES SCIENCE, Nov. 2015
81, 6, 1053, 1062
[Reviewed]

Yuta Isaji; Hodaka Kawahata; Naohiko Ohkouchi; Nanako O. Ogawa; Masafumi Murayama; Kazuki Inoue; Kensaku Tamaki
Varying responses to Indian monsoons during the past 220 kyr recorded in deep-sea sediments in inner and outer regions of the Gulf of Aden
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, Nov. 2015
120, 11, 7253, 7270
[Reviewed]

Haruka Kusuno; Hiroyuki Matsuzaki; Toshi Nagata; Yosuke Miyairi; Yusuke Yokoyama; Naohiko Ohkouchi
An approach for measuring the I-129/I-127 ratio in fish samples
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, Oct. 2015
361, 414, 418
[Reviewed]

Guadalupe Monge; Francisco J. Jimenez-Espejo; Antonio Garcia-Alix; Francisca Martinez-Ruiz; Nadine Mattielli; Clive Finlayson; Naohiko Ohkouchi; Miguel Cortes Sanchez; Jose Maria Bermudez de Castro; Ruth Blasco; Jordi Rosell; Jose Carrion; Joaquin Rodriguez-Vidal; Geraldine Finlayson
Earliest evidence of pollution by heavy metals in archaeological sites
SCIENTIFIC REPORTS, Sep. 2015
5
[Reviewed]

McKenna Amy; Gueneli Nur; Brocks Jochen; Boreham Chris; Ohkouchi Naohiko; Chen Huan; Krajewski Logan; Reddy Christopher; Valentine David; Kellerman Matthias
Structural diversity of petroporphyrins and macromolecules isolated mesoproterozoic sedimentary successions and natural petroleum seeps by FT-ICR MS
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 16 Aug. 2015
250
[Reviewed]

F. Inagaki; K. U. Hinrichs; Y. Kubo; M. W. Bowles; V. B. Heuer; W. L. Hong; T. Hoshino; A. Ijiri; H. Imachi; M. Ito; M. Kaneko; M. A. Lever; Y. S. Lin; B. A. Methé; S. Morita; Y. Morono; W. Tanikawa; M. Bihan; S. A. Bowden; M. Elvert; C. Glombitza; D. Gross; G. J. Harrington; T. Hori; K. Li; D. Limmer; C. H. Liu; M. Murayama; N. Ohkouchi; S. Ono; Y. S. Park; S. C. Phillips; X. Prieto-Mollar; M. Purkey; N. Riedinger; Y. Sanada; J. Sauvage; G. Snyder; R. Susilawati; Y. Takano; E. Tasumi; T. Terada; H. Tomaru; E. Trembath-Reichert; D. T. Wang; Y. Yamada
Exploring deep microbial life in coal-bearing sediment down to ∼2.5 km below the ocean floor
Science, 24 Jul. 2015
349, 6246, 420, 424
[Reviewed]

Chisato Yoshikawa; Hitomi Abe; Maki N. Aita; Florian Breider; Keichi Kuzunuki; Sakae Toyoda; Nanako O. Ogawa; Hisami Suga; Naohiko Ohkouchi; Sebastian O. Danielache; Masahide Wakita; Makio C. Honda; Naohiro Yoshida
Insight into nitrous oxide production processes in the western North Pacific based on a marine ecosystem isotopomer model
Journal of Oceanography, 08 Jul. 2015
1, 18
[Reviewed]

Naohiko Ohkouchi; Junichiro Kuroda; Asahiko Taira
The origin of Cretaceous black shales: a change in the surface ocean ecosystem and its triggers
PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES, Jul. 2015
91, 7, 273, 291
[Reviewed]

Yoshito Chikaraishi; Shawn A. Steffan; Yoshinori Takano; Naohiko Ohkouchi
Diet quality influences isotopic discrimination among amino acids in an aquatic vertebrate
ECOLOGY AND EVOLUTION, May 2015
5, 10, 2048, 2059
[Reviewed]

Yuta Isaji; Hodaka Kawahata; Naohiko Ohkouchi; Masafumi Murayama; Kensaku Tamaki
Terrestrial environmental changes around the Gulf of Aden over the last 210 kyr deduced from the sediment n-alkane record: Implications for the dispersal of Homo sapiens
GEOPHYSICAL RESEARCH LETTERS, Mar. 2015
42, 6, 1880, 1887
[Reviewed]

Yoshinori Takano; Yoshito Chikaraishi; Naohiko Ohkouchi
Isolation of underivatized amino acids by ion-pair high performance liquid chromatography for precise measurement of nitrogen isotopic composition of amino acids: Development of comprehensive LC x GC/C/IRMS method
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, Mar. 2015
379, 16, 25
[Reviewed]

Naohiko Ohkouchi; Nanako O. Ogawa; Yoshito Chikaraishi; Hiroyuki Tanaka; Eitaro Wada
Biochemical and physiological bases for the use of carbon and nitrogen isotopes in environmental and ecological studies
PROGRESS IN EARTH AND PLANETARY SCIENCE, Feb. 2015
2
[Reviewed]

Hidetaka Nomaki; Yoshito Chikaraishi; Masashi Tsuchiya; Takashi Toyofuku; Hisami Suga; Yoko Sasaki; Katsuyuki Uematsu; Akihiro Tame; Naohiko Ohkouchi
Variation in the nitrogen isotopic composition of amino acids in benthic foraminifera: Implications for their adaptation to oxygen-depleted environments
Limnology and Oceanography, 2015
60, 6, 1906, 1916
[Reviewed]

宮地 俊作; 馬谷原 武之; 對馬 孝治; 笹田 勝寛; 河野 英一; 川端 淳; 力石 嘉人; 小川 奈々子; 大河内 直彦
安定同位体分析による北西太平洋におけるカタクチイワシとマイワシの栄養段階と食源の推定.　　　　　　　　　　　　　　　
日本生物地理学会会報, 2015
70, 33, 41
[Reviewed]

高野 淑識; 力石 嘉人; 大河内 直彦
イオンペアクロマトグラフィー／電子スプレーイオン化質量分析法 (LC/ESI-MS)によるアミノ酸のマススペクトル解析
Researches in Organic Geochemistry, 2015
31, 1, 33, 49
[Reviewed]

Sakon, I; Sato, K; Onaka, T; Kimura, S; Wada, S; Ogawa, N.O; Ohkouchi, N; Pathak, A
Infrared Properties of laboratory-synthesized Nitrogen-containing Carbonaceous Composites (NCCs).
Asian Journal of Physics, 2015
24, 8, 1143, 1150
[Reviewed]

Junichiro Kuroda; Natsuko Ihoriya; Rie S. Hori; Nanako O. Ogawa; Minoru Ikehara; Masaharu Tanimizu; Naohiko Ohkouchi
Geochemistry of an Aptian bedded chert succession from the deep Pacifi c basin: New insights into Cretaceous oceanic anoxic event (OAE) 1a
Special Paper of the Geological Society of America, 2015
511, 305, 328
[Reviewed]

N. F. Ishikawa; M. Yamane; H. Suga; N. O. Ogawa; Y. Yokoyama; N. Ohkouchi
Chlorophyll a-specific Delta C-14, delta C-13 and delta N-15 values in stream periphyton: implications for aquatic food web studies
BIOGEOSCIENCES, 2015
12, 22, 6781, 6789
[Reviewed]

Naoto F. Ishikawa; Ichiro Tayasu; Masako Yamane; Yusuke Yokoyama; Saburo Sakai; Naohiko Ohkouchi
SOURCES OF DISSOLVED INORGANIC CARBON IN TWO SMALL STREAMS WITH DIFFERENT BEDROCK GEOLOGY: INSIGHTS FROM CARBON ISOTOPES
RADIOCARBON, 2015
57, 3, 439, 448
[Reviewed]

Takano Yoshinori; Ohkouchi Naohiko
Origins of Carbon and Nitrogen in Mantle Xenolith
JOURNAL OF GEOGRAPHY-CHIGAKU ZASSHI, 2015
124, 3, 503, 514
[Reviewed]

Hidetaka Nomaki; Yoshito Chikaraishi; Masashi Tsuchiya; Takashi Toyofuku; Naohiko Ohkouchi; Katsuyuki Uematsu; Akihiro Tame; Hiroshi Kitazato
Nitrate uptake by foraminifera and use in conjunction with endobionts under anoxic conditions
LIMNOLOGY AND OCEANOGRAPHY, Nov. 2014
59, 6, 1879, 1888
[Reviewed]

K. Maki; N. Ohkouchi; Y. Chikaraishi; H. Fukuda; T. Miyajima; T. Nagata
Influence of nitrogen substrates and substrate C:N ratios on the nitrogen isotopic composition of amino acids from the marine bacterium Vibrio harveyi
GEOCHIMICA ET COSMOCHIMICA ACTA, Sep. 2014
140, 521, 530
[Reviewed]

Takuro Nakayama; Ryoma Kamikawa; Goro Tanifuji; Yuichiro Kashiyama; Naohiko Ohkouchi; John M. Archibald; Yuji Inagaki
Complete genome of a nonphotosynthetic cyanobacterium in a diatom reveals recent adaptations to an intracellular lifestyle
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Aug. 2014
111, 31, 11407, 11412
[Reviewed]

Yoshito Chikaraishi; Shawn A. Steffan; Nanako O. Ogawa; Naoto F. Ishikawa; Yoko Sasaki; Masashi Tsuchiya; Naohiko Ohkouchi
High-resolution food webs based on nitrogen isotopic composition of amino acids
ECOLOGY AND EVOLUTION, Jun. 2014
4, 12, 2423, 2449
[Reviewed]

Masanori Kaneko; Yoshinori Takano; Yoshito Chikaraishi; Nanako O. Ogawa; Susumu Asakawa; Takeshi Watanabe; Seigo Shima; Martin Krueger; Makoto Matsushita; Hiroyuki Kimura; Naohiko Ohkouchi
Quantitative Analysis of Coenzyme F430 in Environmental Samples: A New Diagnostic Tool for Methanogenesis and Anaerobic Methane Oxidation
ANALYTICAL CHEMISTRY, Apr. 2014
86, 7, 3633, 3638
[Reviewed]

Kimura Hiroyuki; Matsushita Makoto; Ishikawa Shugo; Kaneko Masanori; Takano Yoshinori; Ohkouchi Naohiko
Microbial potential and carbon-nitrogen cycles in deep aquifer associated with the accretionary prism in Southwest Japan
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2014
61, 37, 37

Kusuno Haruka; Matsuzaki Hiroyuki; Tokuyama Hironori; Miyairi Yosuke; Nagata Toshi; Yokoyama Yusuke; Ohkouchi Naohiko
129I/127I isotopic ratio in marine fish
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2014
61, 71, 71

Chikaraishi Yoshito; Takano Yoshinori; Ohkouchi Naohiko
Direct uptake of organic nitrogen by C4 plants: evidence from stable isotope analysis of amino acids
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2014
61, 23, 23

Ohkouchi Naohiko; Chikaraishi Yoshito
What modern people eat? Nitrogen isotopic composition of amino acids from nail
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2014
61, 24, 24

Masako Yamane; Yusuke Yokoyama; Yosuke Miyairi; Hisami Suga; Hiroyuki Matsuzaki; Robert B. Dunbar; Naohiko Ohkouchi
COMPOUND-SPECIFIC C-14 DATING OF IODP EXPEDITION 318 CORE U1357A OBTAINED OFF THE WILKES LAND COAST, ANTARCTICA
RADIOCARBON, 2014
56, 3, 1009, 1017
[Reviewed]

Yu Itahashi; Yoshito Chikaraishi; Naohiko Ohkouchi; Minoru Yoneda
Refinement of reconstructed ancient food webs based on the nitrogen isotopic compositions of amino acids from bone collagen: A case study of archaeological herbivores from Tell Ain el-Kerkh, Syria
GEOCHEMICAL JOURNAL, 2014
48, 6, E15, E19
[Reviewed]

Stefan Schouten; Ellen C. Hopmans; Antoni Rosell-Mele; Ann Pearson; Pierre Adam; Thorsten Bauersachs; Edouard Bard; Stefano M. Bernasconi; Thomas S. Bianchi; Jochen J. Brocks; Laura Truxal Carlson; Isla S. Castaneda; Sylvie Derenne; Ayca Dogrul Selver; Koushik Dutta; Timothy Eglinton; Celine Fosse; Valier Galy; Kliti Grice; Kai-Uwe Hinrichs; Yongsong Huang; Arnaud Huguet; Carme Huguet; Sarah Hurley; Anitra Ingalls; Guodong Jia; Brendan Keely; Chris Knappy; Miyuki Kondo; Srinath Krishnan; Sara Lincoln; Julius Lipp; Kai Mangelsdorf; Alfredo Martinez-Garcia; Guillemette Menot; Anchelique Mets; Gesine Mollenhauer; Naohiko Ohkouchi; Jort Ossebaar; Mark Pagani; Richard D. Pancost; Emma J. Pearson; Francien Peterse; Gert-Jan Reichart; Philippe Schaeffer; Gaby Schmitt; Lorenz Schwark; Sunita R. Shah; Richard W. Smith; Rienk H. Smittenberg; Roger E. Summons; Yoshinori Takano; Helen M. Talbot; Kyle W. R. Taylor; Rafael Tarozo; Masao Uchida; Bart E. van Dongen; Benjamin A. S. Van Mooy; Jinxiang Wang; Courtney Warren; Johan W. H. Weijers; Josef P. Werne; Martijn Woltering; Shucheng Xie; Masanobu Yamamoto; Huan Yang; Chuanlun L. Zhang; Yige Zhang; Meixun Zhao; Jaap S. Sinninghe Damste
An interlaboratory study of TEX86 and BIT analysis of sediments, extracts, and standard mixtures
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, Dec. 2013
14, 12, 5263, 5285
[Reviewed]

N. Ohkouchi; Y. Takano
Organic Nitrogen: Sources, Fates, and Chemistry
Treatise on Geochemistry: Second Edition, Nov. 2013
12, 251, 289
[Reviewed]

Ogawa Nanako O; Chikaraishi Y; Ohkouchi N
Trophic position estimates of formalin-fixed samples with nitrogen isotopic compositions of amino acids: an application to gobiid fish (Isaza) in Lake Biwa, Japan
ECOLOGICAL RESEARCH, Sep. 2013
28, 5, 697, 702
[Reviewed]

Shawn A. Steffan; Yoshito Chikaraishi; David R. Horton; Naohiko Ohkouchi; Merritt E. Singleton; Eugene Miliczky; David B. Hogg; Vincent P. Jones
Trophic Hierarchies Illuminated via Amino Acid Isotopic Analysis
PLOS ONE, Sep. 2013
8, 9
[Reviewed]

Kosuke T. Goto; Yasuhito Sekine; Katsuhiko Suzuki; Eiichi Tajika; Ryoko Senda; Tatsuo Nozaki; Ryuji Tada; Kazuhisa Goto; Shinji Yamamoto; Teruyuki Maruoka; Naohiko Ohkouchi; Nanako O. Ogawa
Redox conditions in the atmosphere and shallow-marine environments during the first Huronian deglaciation: Insights from Os isotopes and redox-sensitive elements
Earth and Planetary Science Letters, 05 Aug. 2013
376, 145, 154
[Reviewed]

Yuichi I. Naito; Yoshito Chikaraishi; Naohiko Ohkouchi; Dorothee G. Drucker; Herve Bocherens
Nitrogen isotopic composition of collagen amino acids as an indicator of aquatic resource consumption: insights from Mesolithic and Epipalaeolithic archaeological sites in France
WORLD ARCHAEOLOGY, Aug. 2013
45, 3, 338, 359
[Reviewed]

Yuichi I. Naito; Yoshito Chikaraishi; Naohiko Ohkouchi; Minoru Yoneda
Evaluation of carnivory in inland Jomon hunter-gatherers based on nitrogen isotopic compositions of individual amino acids in bone collagen
JOURNAL OF ARCHAEOLOGICAL SCIENCE, Jul. 2013
40, 7, 2913, 2923
[Reviewed]

Kosuke Kurosawa; Seiji Sugita; Ko Ishibashi; Sunao Hasegawa; Yasuhito Sekine; Nanako O. Ogawa; Toshihiko Kadono; Sohsuke Ohno; Naohiko Ohkouchi; Yoichi Nagaoka; Takafumi Matsui
Hydrogen Cyanide Production due to Mid-Size Impacts in a Redox-Neutral N-2-Rich Atmosphere
ORIGINS OF LIFE AND EVOLUTION OF BIOSPHERES, Jun. 2013
43, 3, 221, 245
[Reviewed]

Yoshinori Takano; Masanori Kaneko; Joerg Kahnt; Hiroyuki Imachi; Seigo Shima; Naohiko Ohkouchi
Detection of coenzyme F430 in deep sea sediments: A key molecule for biological methanogenesis
ORGANIC GEOCHEMISTRY, May 2013
58, 137, 140
[Reviewed]

Naohiko Ohkouchi; Ryuichi Tsuda; Yoshito Chikaraishi; Kazushige Tanabe
A preliminary estimate of the trophic position of the deep-water ram's horn squid Spirula spirula based on the nitrogen isotopic composition of amino acids
MARINE BIOLOGY, Apr. 2013
160, 4, 773, 779
[Reviewed]

Masanori Kaneko; Hiroshi Naraoka; Yoshinori Takano; Naohiko Ohkouchi
Distribution and isotopic signatures of archaeal lipid biomarkers associated with gas hydrate occurrences on the northern Cascadia Margin
CHEMICAL GEOLOGY, Apr. 2013
343, 76, 84
[Reviewed]

Michael J. Miller; Yoshito Chikaraishi; Nanako O. Ogawa; Yoshiaki Yamada; Katsumi Tsukamoto; Naohiko Ohkouchi
A low trophic position of Japanese eel larvae indicates feeding on marine snow
BIOLOGY LETTERS, Feb. 2013
9, 1
[Reviewed]

Chikaraishi Yoshito; Kaneko Masanori; Ohkouchi Naohiko
Reprint of "Stable hydrogen and carbon isotopic compositions of long-chain (C-21-C-33) n-alkanes and n-alkenes in insects"
GEOCHIMICA ET COSMOCHIMICA ACTA, 15 Jan. 2013
111, 78, 87
[Reviewed]

Yoshinori Takano; Jonathan James Tyler; Hisaya Kojima; Yusuke Yokoyama; Yukiko Tanabe; Takaharu Sato; Nanako O. Ogawa; Naohiko Ohkouchi; Manabu Fukui
Holocene lake development and glacial-isostatic uplift at Lake Skallen and Lake Oyako, Lutzow-Holm Bay, East Antarctica: Based on biogeochemical facies and molecular signatures
APPLIED GEOCHEMISTRY, Dec. 2012
27, 12, 2546, 2559
[Reviewed]

Yoshito Chikaraishi; Masanori Kaneko; Naohiko Ohkouchi
Stable hydrogen and carbon isotopic compositions of long-chain (C-21-C-33) n-alkanes and n-alkenes in insects
GEOCHIMICA ET COSMOCHIMICA ACTA, Oct. 2012
95, 53, 62
[Reviewed]

OHKOUCHI Naohiko; CHIKARAISHI Yoshito; OGAWA Nanako O
Diet Analysis Based on Nitrogen Isotopic Composition of Amino Acids
化学と生物, 01 Jun. 2012
50, 6, 430, 434

Hironobu Sakuma; Ryuji Tada; Masayuki Ikeda; Yuichiro Kashiyama; Naohiko Ohkouchi; Nanako O. Ogawa; Satoko Watanabe; Eiichi Tajika; Shinji Yamamoto
High-resolution lithostratigraphy and organic carbon isotope stratigraphy of the Lower Triassic pelagic sequence in central Japan
ISLAND ARC, Jun. 2012
21, 2, 79, 100
[Reviewed]

Kiyotaka Takishita; Yoshito Chikaraishi; Michelle M. Leger; Eunsoo Kim; Akinori Yabuki; Naohiko Ohkouchi; Andrew J. Roger
Lateral transfer of tetrahymanol-synthesizing genes has allowed multiple diverse eukaryote lineages to independently adapt to environments without oxygen
BIOLOGY DIRECT, Feb. 2012
7
[Reviewed]

Ogawa Nanako; Chikaraishi Yoshito; Wada Eitaro; Ohkouchi Naohiko
Ecosystem study of Lake Baikal from nitrogen isotopic analysis of amino acids
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2012
59, 186

TAKANO Yoshinori; CHIKARAISHI Yoshito; OHKOUCHI Naohiko
Ecology of deep-sea benthic archaea: insight from intra-molecular isotope signatures for salvage and de novo pathway
Chikyukagaku, 2012
46, 2, 113, 128

Ichiro Tayasu; Riyo Hirasawa; Nanako O. Ogawa; Naohiko Ohkouchi; Keita Yamada
New organic reference materials for carbon- and nitrogen-stable isotope ratio measurements provided by Center for Ecological Research, Kyoto University, and Institute of Biogeosciences, Japan Agency for Marine-Earth Science and Technology
LIMNOLOGY, Dec. 2011
12, 3, 261, 266
[Reviewed]

Maggie S. Strable; Carolyn L. Tschanz; Behzad Varamini; Yoshito Chikaraishi; Naohiko Ohkouchi; J. Thomas Brenna
Mammalian DNA delta N-15 exhibits 40 parts per thousand intramolecular variation and is unresponsive to dietary protein level
RAPID COMMUNICATIONS IN MASS SPECTROMETRY, Dec. 2011
25, 23, 3555, 3562
[Reviewed]

Yamazaki Atsuko; Watanabe Tsuyoshi; Ogawa; Nanako O; Ohkouchi Naohiko; Shirai Kotaro; Toratani Mitsuhiro; Uematsu Mitsuo
Seasonal variations in the nitrogen isotope composition of Okinotori coral in the tropical western Pacific : A new proxy for marine nitrate dynamics
Journal of Geophysical Research, Biogeosciences, 14 Oct. 2011
116
[Reviewed]

Yasuhito Sekine; Katsuhiko Suzuki; Ryoko Senda; Kosuke T. Goto; Eiichi Tajika; Ryuji Tada; Kazuhisa Goto; Shinji Yamamoto; Naohiko Ohkouchi; Nanako O. Ogawa; Teruyuki Maruoka
Osmium evidence for synchronicity between a rise in atmospheric oxygen and Palaeoproterozoic deglaciation
NATURE COMMUNICATIONS, Oct. 2011
2
[Reviewed]

Atsuko Yamazaki; Tsuyoshi Watanabe; Nanako O. Ogawa; Naohiko Ohkouchi; Kotaro Shirai; Mitsuhiro Toratani; Mitsuo Uematsu
Seasonal variations in the nitrogen isotope composition of Okinotori coral in the tropical western Pacific: A new proxy for marine nitrate dynamics
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, Oct. 2011
116
[Reviewed]

Ayato Kohzu; Akio Imai; Naohiko Ohkouchi; Takehiko Fukushima; Koichi Kamiya; Kazuhiro Komatsu; Noriko Tomioka; Nobuyuki Kawasaki; Shingo Miura; Takayuki Satou
Direct evidence for the alteration of C-13 natural abundances during early diagenesis in Lake Kasumigaura, Japan
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, Oct. 2011
12
[Reviewed]

Chikaraishi Yoshito; Takano Yoshinori; Ogawa Nanako O; Sasaki Yoko; Tsuchiya Masashi; Ohkouchi Naohiko
Food chain analysis by nitrogen isotopic composition of amino acids : Application to terrestrial environments(Advances in molecular and stable isotope studies among the organic geochemical and related communities (Part II))
Researches in organic geochemistry, 30 Sep. 2011
27, 3, 11

Junichiro Kuroda; Masaharu Tanimizu; Rie S. Hori; Katsuhiko Suzuki; Nanako O. Ogawa; Maria L. G. Tejada; Millard F. Coffin; Rodolfo Coccioni; Elisabetta Erba; Naohiko Ohkouchi
Lead isotopic record of Barremian-Aptian marine sediments: Implications for large igneous provinces and the Aptian climatic crisis
EARTH AND PLANETARY SCIENCE LETTERS, Jul. 2011
307, 1-2, 126, 134
[Reviewed]

Yoshito Chikaraishi; Nanako O. Ogawa; Hideyuki Doi; Naohiko Ohkouchi
N-15/N-14 ratios of amino acids as a tool for studying terrestrial food webs: a case study of terrestrial insects (bees, wasps, and hornets)
ECOLOGICAL RESEARCH, Jul. 2011
26, 4, 835, 844
[Reviewed]

Sakae Toyoda; Midori Yano; Sei-ichi Nishimura; Hiroko Akiyama; Atsushi Hayakawa; Keisuke Koba; Shigeto Sudo; Kazuyuki Yagi; Akiko Makabe; Yoshifumi Tobari; Nanako O. Ogawa; Naohiko Ohkouchi; Keita Yamada; Naohiro Yoshida
Characterization and production and consumption processes of N2O emitted from temperate agricultural soils determined via isotopomer ratio analysis
GLOBAL BIOGEOCHEMICAL CYCLES, May 2011
25
[Reviewed]

宮地俊作; 馬谷原武之; 對馬孝治; 笹田勝寛; 河野英一; 伊藤絹子; 川端淳; 力石嘉人; 小川奈々子; 大河内直彦
マイワシとカタクチイワシの栄養段階と食源:全窒素・炭素及びアミノ酸窒素の安定同位体比を用いた食性解析
日本水産学会大会講演要旨集, 27 Mar. 2011
2011, 77

Youping Zhou; Kliti Grice; Yoshito Chikaraishi; Hilary Stuart-Williams; Graham D. Farquhar; Naohiko Ohkouchi
Temperature effect on leaf water deuterium enrichment and isotopic fractionation during leaf lipid biosynthesis: Results from controlled growth of C-3 and C-4 land plants
PHYTOCHEMISTRY, Feb. 2011
72, 2-3, 207, 213
[Reviewed]

Ogawa Nanako O.; Chikaraishi Yoshito; Wada Eitaro; Ohkouchi Naohiko
Compound-specific nitrogen isotope compositions of amino acid as a tool for food-web analysis
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2011
58, 91, 91

Naito Yuichi; Honch Noah; Chikaraishi Yoshito; Ohkouchi Naohiko; Yoneda Minoru
Dietary reconstruction of prehistoric human populations in Japan using nitrogen isotopic analysis of individual amino acids in bone
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2011
58, 0, 151, 151
[Reviewed]

Yuichi I. Naito; Noah V. Honch; Yoshito Chikaraishi; Naohiko Ohkouchi; Minoru Yoneda
Dietary adaptations of prehistoric Japanese in light of nitrogen isotopic compositions of bone collagen amino acids: with special focus on aquatic resources
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, 2011
144, 223, 223
[Reviewed]

Hidetaka Nomaki; Nanako O. Ogawa; Yoshinori Takano; Hisami Suga; Naohiko Ohkouchi; Hiroshi Kitazato
Differing utilization of glucose and algal particulate organic matter by deep-sea benthic organisms of Sagami Bay, Japan
MARINE ECOLOGY PROGRESS SERIES, 2011
431, 11, +
[Reviewed]

Annekatrin J. Enge; Hidetaka Nomaki; Nanako O. Ogawa; Ursula Witte; Markus M. Moeseneder; Gaute Lavik; Naohiko Ohkouchi; Hiroshi Kitazato; Michal Kucera; Petra Heinz
Response of the benthic foraminiferal community to a simulated short-term phytodetritus pulse in the abyssal North Pacific
MARINE ECOLOGY PROGRESS SERIES, 2011
438, 129, 142
[Reviewed]

Junichiro Kuroda; Rie S. Hori; Katsuhiko Suzuki; Darren R. Groecke; Naohiko Ohkouchi
Marine osmium isotope record across the Triassic-Jurassic boundary from a Pacific pelagic site
GEOLOGY, Dec. 2010
38, 12, 1095, 1098
[Reviewed]

Yoshinori Takano; Yoshito Chikaraishi; Nanako O. Ogawa; Hidetaka Nomaki; Yuki Morono; Fumio Inagaki; Hiroshi Kitazato; Kai-Uwe Hinrichs; Naohiko Ohkouchi
Sedimentary membrane lipids recycled by deep-sea benthic archaea
NATURE GEOSCIENCE, Dec. 2010
3, 12, 858, 861
[Reviewed]

Tyler, J; Kashiyama, Y; Ohkouchi, N; Ogawa, N; Yokoyama, Y; Chikaraishi, Y; Staff, RA; Ikehara, M; Ramsey, CB; Bryant, C; Brock, F; Gotanda, K; Haraguchi, T; Yonenobu, H; Nakagawa, T
Tracking aquatic change using chlorin-specific carbon and nitrogen isotopes: The last glacial-interglacial transition at Lake Suigetsu, Japan
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, 23 Sep. 2010
11
[Reviewed]

Yuichi I. Naito; Noah V. Honch; Yoshito Chikaraishi; Naohiko Ohkouchi; Minoru Yoneda
Quantitative Evaluation of Marine Protein Contribution in Ancient Diets Based on Nitrogen Isotope Ratios of Individual Amino Acids in Bone Collagen: An Investigation at the Kitakogane Jomon Site
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, Sep. 2010
143, 1, 31, 40
[Reviewed]

Yoshinori Takano; Yuichiro Kashiyama; Nanako O. Ogawa; Yoshito Chikaraishi; Naohiko Ohkouchi
Isolation and desalting with cation-exchange chromatography for compound-specific nitrogen isotope analysis of amino acids: application to biogeochemical samples
RAPID COMMUNICATIONS IN MASS SPECTROMETRY, Aug. 2010
24, 16, 2317, 2323
[Reviewed]

Yasuhito Sekine; Eiichi Tajika; Naohiko Ohkouchi; Nanako O. Ogawa; Kazuhisa Goto; Ryuji Tada; Shinji Yamamoto; Joseph L. Kirschvink
Anomalous negative excursion of carbon isotope in organic carbon after the last Paleoproterozoic glaciation in North America
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, Aug. 2010
11
[Reviewed]

Kosei E. Yamaguchi; Kazumasa Oguri; Nanako O. Ogawa; Saburo Sakai; Satoshi Hirano; Hiroshi Kitazato; Naohiko Ohkouchi
Geochemistry of modern carbonaceous sediments overlain by a water mass showing photic zone anoxia in the saline meromictic Lake Kai-ike, southwest Japan: I. Early diagenesis of organic carbon, nitrogen, and phosphorus
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, Aug. 2010
294, 1-2, 72, 82
[Reviewed]

Junichiro Kuroda; Katsuhiko Suzuki; Naohiko Ohkouchi
Linkage between massive volcanic events and global extreme climatic events in the Cretaceous period
Journal of Geography, Jun. 2010
119, 3, 534, 555
[Reviewed]

井龍康文; 川幡穂高; 黒田潤一郎; 西弘嗣; 横山祐典; 大河内直彦
IODPの将来のテーマ―IODP第二期にむけた日本版白書より―地球表層環境―古環境から未来環境へ,現状を生き抜くために―
月刊地球, 01 Feb. 2010
32, 2, 112, 119

S. Kusch; Y. Kashiyama; N. O. Ogawa; M. Altabet; M. Butzin; J. Friedrich; N. Ohkouchi; G. Mollenhauer
Implications for chloro- and pheopigment synthesis and preservation from combined compound-specific delta C-13, delta N-15, and Delta C-14 analysis
BIOGEOSCIENCES, 2010
7, 12, 4105, 4118
[Reviewed]

Takano, Y; Yokoyama, Y; Tyler, J.J; Fukui, M; Sato, T; Ogawa, N.O; Suzuki, N; Kitazato, H; Ohkouchi, N
Crustal uplifting rate associated with late-Holocene glacial-isostatic rebound at Skallen and Skarvsnes, Lutzow-Holm Bay, East Antarctica: evidence of a synchrony in sedimentary and biological facies on geological setting.
Biogeosciences Discuss, 2010
7, 4341, 4384

Naito, Y. I; Yamaguchi Y. T; Chikaraishi Y; Ohkouchi N
GC/MS analysis of polyunsaturated fatty acids: Rapid separation and structural assignment with polar GC column
Researches in Organic Geochemistry, 2010
26, 139, 145
[Reviewed]

Yusuke Yokoyama; Mamito Koizumi; Hiroyuki Matsuzaki; Yosuke Miyairi; Naohiko Ohkouchi
DEVELOPING ULTRA SMALL-SCALE RADIOCARBON SAMPLE MEASUREMENT AT THE UNIVERSITY OF TOKYO
RADIOCARBON, 2010
52, 2, 310, 318
[Reviewed]

Yuichi I. Naito; Yoshito Chikaraishi; Naohiko Ohkouchi; Hitoshi Mukai; Yasuyuki Shibata; Noah V. Honch; Yukio Dodo; Hajime Ishida; Tetsuya Amano; Hiroko Ono; Minoru Yoneda
DIETARY RECONSTRUCTION OF THE OKHOTSK CULTURE OF HOKKAIDO, JAPAN, BASED ON NITROGEN COMPOSITION OF AMINO ACIDS: IMPLICATIONS FOR CORRECTION OF C-14 MARINE RESERVOIR EFFECTS ON HUMAN BONES
RADIOCARBON, 2010
52, 2, 671, 681
[Reviewed]

Yoshito Chikaraishi; Nanako O. Ogawa; Yuichiro Kashiyama; Yoshinori Takano; Hisami Suga; Akiko Tomitani; Hideaki Miyashita; Hiroshi Kitazato; Naohiko Ohkouchi
Determination of aquatic food-web structure based on compound-specific nitrogen isotopic composition of amino acids
LIMNOLOGY AND OCEANOGRAPHY-METHODS, Nov. 2009
7, 740, 750
[Reviewed]

Hidetaka Nomaki; Naohiko Ohkouchi; Petra Heinz; Hisami Suga; Yoshito Chikaraishi; Nanako O. Ogawa; Kouhei Matsumoto; Hiroshi Kitazato
Degradation of algal lipids by deep-sea benthic foraminifera: An in situ tracer experiment
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, Sep. 2009
56, 9, 1488, 1503
[Reviewed]

Maria Luisa G. Tejada; Katsuhiko Suzuki; Junichiro Kuroda; Rodolfo Coccioni; John J. Mahoney; Naohiko Ohkouchi; Tatsuhiko Sakamoto; Yoshiyuki Tatsumi
Ontong Java Plateau eruption as a trigger for the early Aptian oceanic anoxic event
GEOLOGY, Sep. 2009
37, 9, 855, 858
[Reviewed]

Marie-Paule Bassez; Yoshinori Takano; Naohiko Ohkouchi
Organic Analysis of Peridotite Rocks from the Ashadze and Logatchev Hydrothermal Sites
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, Jul. 2009
10, 7, 2986, 2998
[Reviewed]

Yoshito Chikaraishi; Ryouichi Tanaka; Ayumi Tanaka; Naohiko Ohkouchi
Fractionation of hydrogen isotopes during phytol biosynthesis
ORGANIC GEOCHEMISTRY, May 2009
40, 5, 569, 573
[Reviewed]

柏山 祐一郎; 小川 奈々子; 大河内 直彦
ヘムおよびヘム起源化石ポルフィリンの窒素・炭素同位体的な特徴
日本地球化学会年会要旨集, 2009
56, 16, 16

柏山 祐一郎; 力石 嘉人; 小川 奈々子; 大河内 直彦
テトラピロール化合物の炭素アイソトポマーと基礎生産者の炭酸同化プロセス
日本地球化学会年会要旨集, 2009
56, 152, 152

Sakuma Hironobu; Tada Ryuji; Ikeda Masayuki; Kashiyama Yuichiro; Ohkouchi Naohiko; O. Ogawa Nanako; Watanabe Satoko; Tajika Eiichi; Yamamoto Shinji
Paleoredox changes in deep-sea environment based on the Permian/Triassic boundary lithostratigraphy on the Jurassic accretionary complex in Japan
Annual Meeting of the Geological Society of Japan, 2009
2009, 0, 90, 90

Yamaguchi, Y. T; Chikaraishi Y; Yokoyama Y; Ohkouchi N
GC/MS analysis of amino acids as ethoxycarbonyl ethyl ester
Researches in Organic Geochemistry, 2009
25, 71, 83
[Reviewed]

Yoshinori Takano; Yoshito Chikaraishi; Nanako O. Ogawa; Hiroshi Kitazato; Naohiko Ohkouchi
Compound-Specific Nitrogen Isotope Analysis of D-Alanine, L-Alanine, and Valine: Application of Diastereomer Separation to delta N-15 and Microbial Peptidoglycan Studies
ANALYTICAL CHEMISTRY, Jan. 2009
81, 1, 394, 399
[Reviewed]

Sunita R. Shah; Gesine Mollenhauer; Naohiko Ohkouchi; Timothy I. Eglinton; Ann Pearson
Origins of archaeal tetraether lipids in sediments: Insights from radiocarbon analysis
GEOCHIMICA ET COSMOCHIMICA ACTA, Sep. 2008
72, 18, 4577, 4594
[Reviewed]

Y. Kashiyama; H. Miyashita; S. Ohkubo; N.O. Ogawa; Y. Chikaraishi; Y. Takano; H. Suga; T. Toyofuku; H. Nomaki; H. Kitazato; T. Nagata; N. Ohkouchi
Evidence of global chlorophyll d
Science, 01 Aug. 2008
321, 5889, 658, 658
[Reviewed]

Naohiko Ohkouchi; Timothy I. Eglinton
Compound-specific radiocarbon dating of Ross Sea sediments: A prospect for constructing chronologies in high-latitude oceanic sediments
QUATERNARY GEOCHRONOLOGY, Aug. 2008
3, 3, 235, 243
[Reviewed]

Yaeko Suzuki; Yoshito Chikaraishi; Nanako O. Ogawa; Naohiko Ohkouchi; Takashi Korenaga
Geographical origin of polished rice based on multiple element and stable isotope analyses
FOOD CHEMISTRY, Jul. 2008
109, 2, 470, 475
[Reviewed]

Robert Gwyn Jenkins; Yoshinori Hikida; Yoshito Chikaraishi; Naohiko Ohkouchi; Kazushige Tanabe
Microbially induced formation of ooid-like coated grains in the Late Cretaceous methane-seep deposits of the Nakagawa area, Hokkaido, northern Japan
ISLAND ARC, Jun. 2008
17, 2, 261, 269
[Reviewed]

Takano Yoshinori; Nomaki Hidetaka; Ogawa Nanako; Chikaraishi Yoshito; Inagaki Fumio; Kitazato Hiroshi; Ohkouchi Naohiko
In-situ tracer experiments for benthic Archaea: carbon isotopic evidence of metabolic activity from archaeal membrane lipids
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2008
55, 154, 154

Ogawa Nanako O.; Chikaraishi Yoshito; Kashiyama Yuichiro; Tomitani Akiko; Kitazato Hiroshi; Ohkouchi Naohiko
Stable isotope abundances in cyanobacterial phycobiliproteins
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2008
55, 184, 184

Ijiri Akira; Harada Naomi; Ogawa Nanako; Ohkouchi Naohiko; Sakamoto Tatsuhiko; Nakatsuka takeshi
Carbon isotope biogeochemistry of acetate from marine sediment
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2008
55, 156, 156

Takano Yoshinori; Chikaraishi Yoshito; Ogawa Nanako; Kitazato Hiroshi; Ohkouchi Naohiko
Compound-specific nitrogen isotope composition for stereoisomers: D- and L-alanine in peptidoglycan from prokaryote
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2008
55, 189, 189

Chikaraishi Yoshito
Nitrogen isotope analysis of amino acids as a tool for elucidating food web
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2008
55, 187, 187

Kashiyama Yuichiro
Multidimensional analyses of the photosynthetic primary production based on stable isotopic compositions of individual chloropigments and their derivatives
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2008
55, 186, 186

Koizumi Mamito; Yokoyama Yusuke; Ohkouchi Naohiko; John B Anderson
Development a novel methods to isolate fatty acids for compound-specific radiocarbon dating to reconstruct West Antarctic Ice Sheet melting history
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2008
55, 326, 326

Suzuki Katsuhiko; Tejada Maria Luisa G.; Kuroda Jun-ichiro; Coccioni R.; Ohkouchi Naohiko; Sakamoto Tatsuhiko; Tatsumi Yoshiyuki; Mahoney John
Secular change in the Os isotope composition of Early Cretaceous seawater: an indicator of a LIP-OAE link
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2008
55, 397, 397

Yamazaki Atsuko; Watanabe Tsuyoshi; Kawashima Tatsunori; Ogawa Nanako; Ohkouchi Naohiko; Shirai Kotaro; Sano Yuji; Uematsu Mitsuo
Seasonal variation of nitrogen isotopes in coral skeletons:New proxy for nutrients activity of surface oceans in low latitude
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2008
55, 406, 406

関根 康人; 鈴木 勝彦; 仙田 量子; 田近 英一; 多田 隆治; 後藤 和久; 山本 信治; 大河内 直彦; 小川 奈々子
カナダ・原生代初期ヒューロニアン累層群における氷河性堆積物層のオスミウム同位体変動：酸素増大イベントと気候変動の因果関係に与える示唆
日本地球化学会年会要旨集, 2008
55, 389, 389

Yuichi I Naito , Yoshito Chikaraishi , Naohiko Ohkouchi , Hitoshi Mukai , Yasuyuki Shibata , Noah V Honch , Yukio Dodo , Hajime Ishida , Tetsuya Amano , Hiroko Ono and Minoru Yoneda
Dietary reconstruction of Jomon human remains in Hokkaido utilizing nitrogen isotopic analysis of amino acids
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2008
55, 0, 188, 188
[Reviewed]

Kashiyama, Y; Ogawa, N.O; Shiro, M; Tada,R; Kitazato, H; Ohkouchi, N
Reconstruction of the biogeochemistry and ecology of photoautotrophs based on the nitrogen and carbon isotopic compositions of vanadyl porphyrins from Miocene siliceous sediments,　　　　　　　　　　　　　　　
Biogeosciences, 2008
5, 797, 816

Yoshito Chikaraishi; Yuichiro Kashiyama; Nanako O. Ogawa; Hiroshi Kitazato; Mitsuru Satoh; Shinya Nomoto; Naohiko Ohkouchi
A compound-specific isotope method for measuring the stable nitrogen isotopic composition of tetrapyrroles
ORGANIC GEOCHEMISTRY, 2008
39, 5, 510, 520
[Reviewed]

Yuichiro Kashiyama; Nanako O. Ogawa; Junichiro Kuroda; Motoo Shiro; Shinya Nomoto; Ryuji Tada; Hiroshi Kitazato; Naohiko Ohkouchi
Diazotrophic cyanobacteria as the major photoautotrophs during mid-Cretaceous oceanic anoxic events: Nitrogen and carbon isotopic evidence from sedimentary porphyrin
ORGANIC GEOCHEMISTRY, 2008
39, 5, 532, 549
[Reviewed]

Hidetaka Nomaki; Nanako O. Ogawa; Naohiko Ohkouchi; Hisami Suga; Takashi Toyofuku; Motohiro Shimanaga; Takeshi Nakatsuka; Hiroshi Kitazato
Benthic foraminifera as trophic links between phytodetritus and benthic metazoans: carbon and nitrogen isotopic evidence
MARINE ECOLOGY PROGRESS SERIES, 2008
357, 153, 164
[Reviewed]

Naohiko Ohkouchi; Yoji Nakajima; Nanako O. Ogawa; Yoshito Chikaraishi; Hisami Suga; Saburo Sakai; Hiroshi Kitazato
Carbon isotopic composition of the tetrapyrrole nucleus in chloropigments from a saline meromictic lake: A mechanistic view for interpreting the isotopic signature of alkyl porphyrins in geological samples
ORGANIC GEOCHEMISTRY, 2008
39, 5, 521, 531
[Reviewed]

Yuichiro Kashiyama; Motoo Shiro; Ryuji Tada; Naohiko Ohkouchi
A novel vanadyl alkylporphyrins from geological samples: A possible derivative of divinylchlorophylls or bacteriochlorophyll a?
CHEMISTRY LETTERS, Jun. 2007
36, 6, 706, 707
[Reviewed]

Junichiro Kuroda; Nanako O. Ogawa; Masaharu Tanimizu; Millard F. Coffin; Hidekazu Tokuyama; Hiroshi Kitazato; Naohiko Ohkouchi
Contemporaneous massive subaerial volcanism and late cretaceous Oceanic Anoxic Event 2
EARTH AND PLANETARY SCIENCE LETTERS, Apr. 2007
256, 1-2, 211, 223
[Reviewed]

能美仁博; 横山祐典; 三浦英樹; 大河内直彦
深海底堆積物の解析に夜最終氷期以降の南極半島周辺氷床の消長　　　　　　　　　　　　　　　
第四紀研究, 2007
46, 2, 103, 117
[Reviewed]

Yuichiro Kashiyama; Hiroshi Kitazato; Naohiko Ohkouchi
An improved method for isolation and purification of sedimentary porphyrins by high-performance liquid chromatography for compound-specific isotopic analysis
JOURNAL OF CHROMATOGRAPHY A, Jan. 2007
1138, 1-2, 73, 83
[Reviewed]

Yoshito Chikaraishi; Kohei Matsumoto; Hiroshi Kitazato; Naohiko Ohkouchi
Sources and transformation processes of pheopigments: Stable carbon and hydrogen isotopic evidence from Lake Haruna, Japan
ORGANIC GEOCHEMISTRY, 2007
38, 6, 985, 1001
[Reviewed]

Yoshito Chikaraishi; Yuichiro Kashiyamal; Nanako O. Ogawa; Hiroshi Kitazato; Naohiko Ohkouchi
Metabolic control of nitrogen isotope composition of amino acids in macroalgae and gastropods: implications for aquatic food web studies
MARINE ECOLOGY PROGRESS SERIES, 2007
342, 85, 90
[Reviewed]

Yusuke Yokoyama; Tatsuhiro Naruse; Nanako O. Ogawa; Ryuji Tada; Hiroshi Kitazato; Naohiko Ohkouchi
Dust influx reconstruction during the last 26,000 years inferred from a sedimentary leaf wax record from the Japan Sea
GLOBAL AND PLANETARY CHANGE, Dec. 2006
54, 3-4, 239, 250
[Reviewed]

Koji Kameo; Makoto Okada; Moamen El-Masry; Toshio Hisamitsu; Saneatsu Saito; Hiroomi Nakazato; Naohiko Ohkouchi; Minoru Ikehara; Hisato Yasuda; Hiroshi Kitazato; Asahiko Taira
Age model, physical properties and paleoceanographic implications of the middle Pleistocene core sediments in the Choshi area, central Japan
ISLAND ARC, Sep. 2006
15, 3, 366, 377
[Reviewed]

Ohkouchi, N; Toyoda, M; Yokoyama, Y; Miura, H; Chikaraishi, Y; Tokuyama, H; Kitazato, H
Massive melting of West Antarctic Ice Sheet during the latest pleistocene and holocene: Hydrogen isotopic records of sedimentary biomarkers in Ross Sea
GEOCHIMICA ET COSMOCHIMICA ACTA, 01 Aug. 2006
70, 18, A453, A453
[Reviewed]

N Ohkouchi; TI Eglinton
Radiocarbon constraint on relict organic carbon contributions to Ross Sea sediments
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, Apr. 2006
7
[Reviewed]

Ogawa Nanako, O.; Chikaraishi Yoshito; Wada Eitaro; Kitazato Hiroshi; Ohkouchi Naohiko
Compound-specific nitrogen isotopic composition of amino acids from Omul fish in Lake Baikal: A new approach for studying biological nitrogen cycle in the lake
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2006
53, 232, 232

Kuroda Junichiro; Ohkouchi Naohiko
Implication of spatiotemporal distribution of black shales deposited during the Cretaceous Oceanic Anoxic Event-2
Paleontological Research, 2006
10, 4, 345, 358
[Reviewed]

Ohkouchi N; Kashiyama Y; Kuroda J; Ogawa N. O; Kitazato H
The importance of diazotrophic cyanobacteria as primary producers during Cretaceous Oceanic Anoxic Event 2
Biogeosciences, 2006
3, 4, 467, 478
[Reviewed]

Hidetaka Nomaki; Petra Heinz; Takeshi Nakatsuka; Motohiro Shimanaga; Naohiko Ohkouchi; Nanako O. Ogawa; Kazuhiro Kogure; Eiko Ikemoto; Hiroshi Kitazato
Different ingestion patterns of C-13-labeled bacteria and algae by deep-sea benthic foraminifera
MARINE ECOLOGY PROGRESS SERIES, 2006
310, 95, 108
[Reviewed]

Ohkouchi N; Nakajima Y; Okada H; Ogawa NO; Suga H; Oguri K; Kitazato H
Biogeochemical processes in the saline meromictic Lake Kaiike, Japan: implications from molecular isotopic evidences of photosynthetic pigments.
Environmental microbiology, Jul. 2005
7, 1009, 1016
[Reviewed]

Chikaraishi Y; Matsumoto K; Ogawa NO; Suga H; Kitazato H; Ohkouchi N
Hydrogen, carbon and nitrogen isotopic fractionations during chlorophyll biosynthesis in C3 higher plants.
Phytochemistry, Apr. 2005
66, 8, 911, 920
[Reviewed]

N Ohkouchi; TI Eglinton; KA Hughen; E Roosen; LD Keigwin
Radiocarbon dating of alkenones from marine sediments: III. Influence of solvent extraction procedures on C-14 measurements of foraminifera
RADIOCARBON, 2005
47, 3, 425, 432
[Reviewed]

N Ohkouchi; L Xu; CM Reddy; D Montlucon; TI Eglinton
Radiocarbon dating of alkenones from marine sediments: I. Isolation protocol
RADIOCARBON, 2005
47, 3, 401, 412
[Reviewed]

Junichiro Kuroda; Naohiko Ohkouchi; Teruaki Ishii; Hidekazu Tokuyama; Asahiko Taira
Lamina-scale analysis of sedimentary components in Cretaceous black shales by chemical compositional mapping: Implications for paleoenvironmental changes during the Oceanic Anoxic Events
Geochimica et Cosmochimica Acta, 2005
69, 6, 1479, 1494
[Reviewed]

OKADA Makoto; Kameo Koji; Nakazato Hiroomi; Ohkouchi Naohiko; Hisamitsu Toshio; Kitazato H
O-1 Chronostaratigraphy of the Choshi Core
Annual Meeting of the Geological Society of Japan, 2004
2004, 26, 26

Nakajima Y; Shimizu H; Ogawa NO; Sakamoto T; Okada H; Koba K; Kitazato H; Ohkouchi N
Vertical distributions of stable isotopic compositions and bacteriochlorophyll homologues in suspended particulate matter in saline meromictic Lake Abashiri
Limnology, 2004
5, 3, 185, 189
[Reviewed]

Nakajima Y; Okada H; Oguri K; Suga H; Kitazato H; Koizumi Y; Fukui M; Ohkouchi N
Distribution of chloropigments in suspended particulate matter and benthic microbial mat of a meromictic lake, Lake Kaiike, Japan.
Environmental microbiology, Nov. 2003
5, 11, 1103, 1110
[Reviewed]

G Mollenhauer; TI Eglinton; N Ohkouchi; RR Schneider; PJ Muller; PM Grootes; J Rullkotter
Asynchronous alkenone and foraminfera records from the Benguela Upwelling System
GEOCHIMICA ET COSMOCHIMICA ACTA, Jun. 2003
67, 12, 2157, 2171
[Reviewed]

Ohkouchi Naohiko
Origin of Cretaceous black shales deduced from chemical fossils and isotopic compositions
Fossils, 2003
74, 48, 56

N Ohkouchi; TI Eglinton; JM Hayes
Radiocarbon dating of individual fatty acids as a tool for refining Antarctic margin sediment chronologies
RADIOCARBON, 2003
45, 1, 17, 24
[Reviewed]

M Pagani; KH Freeman; N Ohkouchi; K Caldeira
Comparison of water column [CO2aq] with sedimentary alkenone-based estimates: A test of the alkenone- CO2 proxy
PALEOCEANOGRAPHY, Dec. 2002
17, 4
[Reviewed]

N Ohkouchi; TI Eglinton; LD Keigwin; JM Hayes
Spatial and temporal offsets between proxy records in a sediment drift
SCIENCE, Nov. 2002
298, 5596, 1224, 1227
[Reviewed]

NO Ogawa; T Koitabashi; H Oda; T Nakamura; N Ohkouchi; E Wada
Fluctuations of nitrogen isotope ratio of gobiid fish (Isaza) specimens and sediments in Lake Biwa, Japan, during the 20th century
LIMNOLOGY AND OCEANOGRAPHY, Jul. 2001
46, 5, 1228, 1236
[Reviewed]

A Rosell-Mele; E Bard; KC Emeis; JO Grimalt; P Muller; R Schneider; Bouloubassi, I; B Epstein; K Fahl; A Fluegge; K Freeman; M Goni; U Guntner; D Hartz; S Hellebust; T Herbert; M Ikehara; R Ishiwatari; K Kawamura; F Kenig; J de Leeuw; S Lehman; L Mejanelle; N Ohkouchi; RD Pancost; C Pelejero; F Prahl; J Quinn; JF Rontani; F Rostek; J Rullkotter; J Sachs; T Blanz; K Sawada; D Schulz-Bull; E Sikes; C Sonzogni; Y Ternois; G Versteegh; JK Volkman; S Wakeham
Precision of the current methods to measure the alkenone proxy U-37(K ') and absolute alkenone abundance in sediments: Results of an interlaboratory comparison study
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, Jul. 2001
2
[Reviewed]

Y Ternois; K Kawamura; L Keigwin; N Ohkouchi; T Nakatsuka
A biomarker approach for assessing marine and terrigenous inputs to the sediments of Sea of Okhotsk for the last 27,000 years
GEOCHIMICA ET COSMOCHIMICA ACTA, Mar. 2001
65, 5, 791, 802
[Reviewed]

黒田 潤一郎; 大河内 直彦; 山根 雅之; 佐藤 暢; 石井 輝秋; 江口 暢久; 徳山 英一; 平 朝彦
P-86 Paleoceanographic study of Cenomanian-Turonian black shale horizon in Gubbio, Italy
Annual Meeting of the Geological Society of Japan, 2001
2001, 0, 240, 240
[Reviewed]

Kawamura K; Kaji T; Ohkouchi N; Nakatsuka T; Ikehara M
Vertical profiles of lipids, total organic carbon, total nitrogen and stable carbon isotopic ratios in the suspended particles in the northern North Pacific and Bering Sea
Bulletin of the Plankton Society of Japan, 2000
47, 2, 140, 143
[Reviewed]

Ohkouchi N; Kawamura K; Takemoto N; Ikehara M; Nakatsuka T
Implications of carbon isotope ratios of C27-C33 alkanes and C37 alkenes for the sources of organic matter in the Southern Ocean surface sediments
Geophysical Research Letters, 2000
27, 2, 233, 236
[Reviewed]

Naohiko Ohkouchi; Kimitaka Kawamura; Hodaka Kawahata
Distributions of Three- to Seven-Ring Polynuclear Aromatic Hydrocarbons on the Deep Sea Floor in the Central Pacific
Environmental Science & Technology, Sep. 1999
33, 18, 3086, 3090

Ikehara M; Kawamura K; Ohkouchi N; Taira A
Organic geochemistry of greenish clay and organic-rich sediments since the early Miocene from Hole 985A, Norway Basin
Proceedings of the Ocean Drilling Program: Scientific Results, 1999
162, 209, 216
[Reviewed]

N Ohkouchi; K Kawamura; A Taira
Molecular paleoclimatology: reconstruction of climate variabilities in the late Quaternary
ORGANIC GEOCHEMISTRY, Sep. 1997
27, 3-4, 173, 183
[Reviewed]

N Ohkouchi; K Kawamura; A Taira
Fluctuations of terrestrial and marine biomarkers in the western tropical Pacific during the last 23,300 years
PALEOCEANOGRAPHY, Aug. 1997
12, 4, 623, 630
[Reviewed]

M Ikehara; K Kawamura; N Ohkouchi; K Kimoto; M Murayama; T Nakamura; T Oba; A Taira
Alkenone sea surface temperature in the Southern Ocean for the last two deglaciations
GEOPHYSICAL RESEARCH LETTERS, Mar. 1997
24, 6, 679, 682
[Reviewed]

IKEHARA M.; Kawamura K.; Ohkouchi N.; Taira.A.
284 Sedimentation of organic-rich dark layers in the Nordic Sea during the middle Miocene and its paleoceanographic implications
Annual Meeting of the Geological Society of Japan, 1997
1997, 243, 243

N OHKOUCHI; H KAWAHATA; M OKADA; M MURAYAMA; E MATSUMOTO; T NAKAMURA; A TAIRA
BENTHIC FORAMINIFERA CADMIUM RECORD FROM THE WESTERN EQUATORIAL PACIFIC
MARINE GEOLOGY, Sep. 1995
127, 1-4, 167, 180
[Reviewed]

N OHKOUCHI; K KAWAMURA; T NAKAMURA; A TAIRA
SMALL CHANGES IN THE SEA-SURFACE TEMPERATURE DURING THE LAST 20,000 YEARS - MOLECULAR EVIDENCE FROM THE WESTERN TROPICAL PACIFIC
GEOPHYSICAL RESEARCH LETTERS, Oct. 1994
21, 20, 2207, 2210
[Reviewed]

N OHKOUCHI; H KAWAHATA; M MURAYAMA; M OKADA; T NAKAMURA; A TAIRA
WAS DEEP-WATER FORMED IN THE NORTH PACIFIC DURING THE LATE QUATERNARY - CADMIUM EVIDENCE FROM THE NORTHWEST PACIFIC
EARTH AND PLANETARY SCIENCE LETTERS, Jun. 1994
124, 1-4, 185, 194
[Reviewed]

OHKOUCHI Naohiko; TAIRA Asahiko
Post-Glacial Marine Environmental Changes Revealed from Deep Sea Sediments.
The Quat. Res., 1991
30, 4, 297, 312

OHKOUCHI Naohiko
Active geological structures and tectonics in sagami bay area.
J. Geogr., 1990
99, 5, 458, 470

黒田潤一郎; 黒田潤一郎; 諸野祐樹; 松崎賢史; 菅寿美; 亀尾桂; 森郁晃; 森郁晃; 森尚仁; 蘭慧; 古知武; 吉岡純平; 根本夏林; 太田映; 村井亮太; 西村知泰; 治良真; 伊左治雄太; 横山祐典; 大河内直彦; 池原実
新青丸KS-23-5次航海速報
海と地球のシンポジウム発表課題一覧・要旨集(CD-ROM), 2024
2023

松本廣直; 石川晃; 大河内直彦; 小川奈々子; 白井厚太朗; 黒田潤一郎; 鈴木勝彦
Re-examination of the linkages between the Ontong Java volcanism and Cretaceous oceanic anoxic event
日本地球化学会年会要旨集(Web), 2023
70th

黒田潤一郎; 太田映; 石川晃; 鈴木勝彦; TEJADA M.L.G.; 大河内直彦
Osmium isotope records at the Cretaceous-Paleogene Boundary strata in Southern Hemisphere marine sediments and their significance as a chemostratigraphic correlation tool.
日本地球化学会年会要旨集(Web), 2023
70th

太田映; 黒田潤一郎; TEJADA Maria Luisa; 石川晃; 鈴木勝彦; 大河内直彦
IODP Expedition 369: Osmium isotope stratigraphy and platinum group elements composition at the Cretaceous-Paleogene boundary on the Mentelle Basin off the southwest coast of Australia
日本地球惑星科学連合大会予稿集(Web), 2023
2023

伊左治雄太; 吉村寿紘; 荒岡大輔; 栗栖美菜子; 大河内直彦
Method development of stable iron isotope analysis of heme
日本地球化学会年会要旨集(Web), 2023
70th

梶田 展人; 関 宰; 山本 正伸; 大河内 直彦; 岡田 誠; 羽田 裕貴; 菅沼 悠介
千葉複合セクションのn-アルカン分析による海洋酸素同位体ステージ19の陸上気候・植生変動復元
日本地球化学会第69回年会講演要旨集, Nov. 2022

吉村寿紘; CHANG Q.; 大河内直彦; 石谷佳之; ULANOVA D.; 遠藤博寿; 黒田潤一郎; 氏家由利香
Inter-chamber and -individual differences in trace elements to Ca ratios of planktonic foraminifera obtained from surface sediments
日本地球化学会年会要旨集(Web), 2022
69th

梶田 展人; 中澤 努; 大河内 直彦; 佐藤 都; 原田 尚美; 川幡 穂高
下総層群に含まれるアルケノンを用いた古東京湾の古水温復元
日本地球化学会第68回年会講演要旨集, Dec. 2021
[Reviewed]

古知武; 黒田潤一郎; 小川奈々子; 吉村寿紘; 宮崎隆; VAGLAROV Bogdan Stefanov; 大河内直彦
Reconstruction of the Mediterranean sulfur cycle during the Messinian salinity crisis using evaporites
日本地球惑星科学連合大会予稿集(Web), 2021
2021

吉川知里; 眞壁明子; 松井洋平; 豊田栄; 本多牧生; 横川太一; 布浦拓郎; 大河内直彦
Nitrogen and oxygen isotopes of nitrate in the eastern Indian Ocean
日本地球化学会年会要旨集(Web), 2020
67th

板橋悠; 大森貴之; 尾嵜大真; 山崎孔平; 大河内直彦; 高野淑識; 小川奈々子; 石川尚人; 米田穣
アミノ酸の微量グラファイト化による遺跡出土骨¹⁴C年代測定の高精度化
日本文化財科学会大会研究発表要旨集, 2019
36th

畑中美沙希; 横山祐典; CLARK Geoffrey; 宮島利宏; 小川奈々子; 宮入陽介; 大河内直彦
半化石骨安定同位体分析による後期完新世マダガスカルにおける絶滅大型動物の古生態・古気候復元
日本地球化学会年会要旨集(Web), 2019
66th

松林順; 長田穣; 陀安一郎; 大河内直彦
海洋アイソスケープを用いたサケの回遊履歴復元
日本魚類学会年会講演要旨, 2019
52nd

前田歩; 吉村寿紘; 荒岡大輔; 鈴木淳; 為則雄祐; 藤田和彦; 豊福高志; 大河内直彦; 川幡穂高
大型底生有孔虫のMg同位体比と代替指標としての可能性
日本古生物学会例会講演予稿集, 2019
168th

吉村寿紘; 日下宗一郎; 為則雄祐; 荒岡大輔; 川幡穂高; 大河内直彦
縄文時代晩期の愛知県稲荷山貝塚より出土した人骨の歯資料における軽元素の微小領域分布と化学形態
日本地球化学会年会要旨集(Web), 2019
66th

河戸勝; POULSEN Jan Yde; 土田真二; 井田齊; 力石嘉人; 力石嘉人; 大河内直彦; 小栗一将; 後藤慎平; 小澤元希; 小澤元希; 田中彰; 宮正樹; 佐土哲也; 藤倉克則; 藤原義弘
駿河湾深海域より発見した巨大セキトリイワシの1種
ブルーアースサイエンス・テク要旨集, 2018
2018

松林順; 陀安一郎; 大河内直彦
アミノ酸窒素同位体比とアイソスケープを活用した,海産魚類の移動履歴推定
日本生態学会大会講演要旨(Web), 2018
65th

吉村寿紘; 荒岡大輔; 黒田潤一郎; 伊左治雄太; 川幡穂高; 大河内直彦
海水の蒸発に伴う主成分イオンの濃度変化とMg同位体比による地中海蒸発イベントの濃縮過程の復元
日本地球化学会年会要旨集(Web), 2018
65th

黒田潤一郎; 斎藤実篤; 臼井洋一; 萩野恭子; HSIUNG Kan‐Hsi; 村山雅史; 安藤卓人; 大河内直彦
南西太平洋ロードハウライズ掘削試料の白亜紀‐古第三紀(旧成紀)境界層の層序
日本地質学会学術大会講演要旨, 10 Sep. 2017
124th, 146

大河内 直彦
同位体とトレーサビリティー (特集 同位体の化学と食の安全)
現代化学 = Chemistry today, Mar. 2017
552, 30, 33

横山 祐典; 大河内 直彦
放射性炭素-14を使った海洋生物の動態・生態系理解 (特集 同位体の化学と食の安全)
現代化学 = Chemistry today, Mar. 2017
552, 44, 46

Ishikawa, N.F.; Nyffeler, R.; Haghipour, N.; Eglinton, T.I.; Ohkouchi, N
Compound-specific 14C analysis in ecology: Do trees recycle chlorophyll?
Laboratry of Ion Beam Physics, ETH Zurich, Annual Report 2017, 2017

大河内 直彦
科学通信 分子で地球を読む(No.19)人類紀を生きる : 窒素編
科学, Mar. 2016
86, 3, 196, 198

藤原義弘; 土田真二; 河戸勝; 笠井彩香; 高橋幸愛; 屋良由美子; 福場辰洋; 渡邊佳孝; 吉田弘; 力石嘉人; 大河内直彦; 加藤千明; 藤倉克則; 増田殊大; 巻俊宏; 後藤慎平; 後藤慎平; 山中寿朗; 大西雄二; 田中彰
深海生態系におけるトップ・プレデターの機能に関する研究
ブルーアース要旨集, 2016
2016

吉川 知里; 阿部瞳; 相田真希; 小川奈々子; 菅寿美; 大河内直彦; 脇田昌英; 本多牧生; 豊田栄; 吉田尚弘
海洋N2O排出量の推定を目的とした海洋低次生態系-同位体分子種モデルの開発　　　　　　　　　　　　　　　
月刊海洋, 2016
48, 7, 302, 308

大河内 直彦; 黒田 潤一郎
科学通信 分子で地球を読む(No.17)塩の世界
科学, Aug. 2015
85, 8, 735, 737

土屋正史; 宮脇省次; 力石嘉人; 小栗一将; 豊福高志; 多米晃裕; 植松勝之; 竹田晃治; 坂井宥哉; 三宅裕志; 大河内直彦; 丸山正
底生有孔虫Planoglabratella opercularisにみられる盗葉緑体の獲得機構と殻形成に与える影響
日本古生物学会年会講演予稿集, 26 Jun. 2015
2015, 19

大河内 直彦
科学通信 分子で地球を読む(No.16)地球はクロマトグラフィー
科学, May 2015
85, 5, 437, 439

藤原義弘; 土田真二; 河戸勝; 福場辰洋; 渡邊佳孝; 吉田弘; 笠井彩香; 高橋幸愛; 後藤慎平; 力石嘉人; 大河内直彦; 加藤千明; 藤倉克則; 増田殊大; 巻俊宏; 田中彰
深海域におけるトップ・プレデターに関する研究
ブルーアース要旨集, 2015
2015

板橋悠; 高野淑識; 力石嘉人; 小川奈々子; 大河内直彦; 山根雅子; 横山祐典; 米田穣
液体クロマトグラフィを用いた遺跡出土骨試料の単離アミノ酸の放射性炭素年代測定
日本文化財科学会大会研究発表要旨集, 2015
32nd

大河内 直彦
科学通信 分子で地球を読む(No.14)海のホメオスタシス
科学, Oct. 2014
84, 10, 1001, 1003

兒玉 賢哉; 関根 康人; 高野 淑識; 小川 奈々子; 大河内 直彦; 小林 敬道; 関根 利守
O6-06 氷衛星および小惑星における有機化合物の生成と衝撃変成に関する実験的研究(口頭発表セッション6 表層進化・物質I,口頭発表)
日本惑星科学会秋期講演会予稿集, 10 Sep. 2014
2014, "O6, 06"

原田尚美; 大河内直彦; 南雅代; 関宰; 岡崎裕典
古気候・古環境分野からの提案
日本地球化学会年会講演要旨集, 2014
61st, 139, 134

金子 雅紀; 高野 淑識; 大河内 直彦; 木村 浩之
P17-9 メタン生成補酵素F430の超高感度定量分析法 : 環境中のメタン生成および嫌気的メタン酸化ポテンシャルへの応用(ポスター発表)
日本微生物生態学会講演要旨集, 2014
2014, 180, 180

Yokoyama Yusuke; Miyairi Yosuke; Yamane Masako; Hirabayashi Shoko; Ishiwa Takeshige; Sawada Chikako; Aze Takahiro; Ohkouchi Naohiko
Paleoclimate study using radiocarbon measured by Single Stage Accelerator Mass Spectrometry
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2014
61, 0, 290, 290

大河内 直彦; 黒田 潤一郎
On the Cretaceous scientific drilling
号外地球, 2014
65, 264, 267

布浦 拓郎; 高木 善弘; 力石 嘉人; 森 浩二; 佐藤 喬章; 原田 健史; 柳川 勝紀; 首藤 彩; 大河内 直彦; 跡見 晴幸; 藤田 信之; 高井 研
O12-12 嫌気性水素酸化好熱細菌Thermosulfidibacterの可逆的TCA回路(口頭発表)
日本微生物生態学会講演要旨集, 2014
2014

OHKOUCHI N.
Organic matter : A nice target for hew generations
日本鉱物科学会年会講演要旨集, 05 Sep. 2013
2013, 278, 278

野牧秀隆; 力石嘉人; 土屋正史; 豊福高志; 大河内直彦; 植松勝之; 多米晃裕; 北里洋
嫌気環境下における底生有孔虫細胞内での脱窒と微生物の関与
日本古生物学会年会講演予稿集, 28 Jun. 2013
2013, 24

Suga Hisami P; Sakai Saburo; Toyofuku Takashi; Ohkouchi Naohiko
A simplified method for determination of total alkalinity in seawater based on the small sample one-point titration method
JAMSTEC Report of Research and Development, 2013
17, 0, 23, 33

陀安一郎; 長谷川尚志; 由水千景; 力石嘉人; 小川奈々子; 大河内直彦
アミノ酸窒素同位体比を用いた、陸域分解系における土壌動物の資源利用解析　　　　　　　　　　　　　　　
日本生態学会第60回大会, 2013

Yamaguchi Y. T; Ohkouchi N
Compound-Specific Isotope Analysis as a Tool to Study Microbial Processes in Marine Environments　　　　　　　　　　　　　　　
Journal of Japan Society on Water Environment, 2013
36, 242, 246
[Invited]

大河内 直彦; 横山 祐典
科学通信 分子で地球を読む(No.5)三度目の春を迎えつつある放射性炭素年代法
科学, May 2012
82, 5, 483, 485

大河内 直彦; 高野 淑識; 野牧 秀隆
科学通信 分子で地球を読む(No.4)エコに暮らす深海底の微生物
科学, Feb. 2012
82, 2, 141, 143

Kuroda Junichiro; Hori Rie S; Suzuki Katsuhiko; Ohkouchi Naohiko
Mesozoic eruptions of Large Igneous Provinces and environmental changes
Annual Meeting of the Geological Society of Japan, 2012
2012, 0

Yoneda Minoru; Gakuhari Takashi; Naito Yuichi I; Chikaraishi Yoshito; Ohkouchi Naohiko
The diet and subsistence of Jomon hunter-gatherers in light of isotope ecology.
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2012
59, 0

内藤裕一; 力石嘉人; 大河内直彦; 米田 穣
古人骨および動物遺存体のアミノ酸窒素同位体比分析について　　　　　　　　　　　　　　　
佐久考古通信, 2012
111, 17, 18

Yamaguchi Yasuhiko; Takano Yoshinori; Chikaraishi Yoshito; Suga Hisami; Ogawa Nanako; Yokoyama Yusuke; Ohkouchi Naohiko
Nitrogen isotopic composition and D/L ratio of amino acids in deep-subsurface marine sediments
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2012
59, 0

長谷川尚志; 力石嘉人; 小川奈々子; 大河内直彦; 陀安一郎
アミノ酸窒素同位体比による陸域腐食食物網解析の試み　　　　　　　　　　　　　　　
2012

Makabe, A; Koba, K; Yoshimizu, C; Tayasu, I; Ogawa, N. O; Ohkouchi, N; Toyoda, S; Yoshida, N; Nagata, T
Fate of atmospheric nitrate and nitrogen biogeochemical processes in lake Biwa elucidated by multiple oxygen isotopes　　　　　　　　　　　　　　　
ASLO Summer Meeting, 2012

Ichiro Tayasu; Naohiko Ohkouchi; Carsten Schubert; Matthew McCarthy
New frontiers of isotope tools for biogeochemistry, ecology and environmental sciences　　　　　　　　　　　　　　　
ASLO Summer Meeting, 2012

三宅裕志; 寺沢真琴; 小川奈々子; 大河内直彦
東日本大震災で被災中にサツマハオリムシ水槽に起こった出来事
ブルーアース要旨集, 2012
2012, 113

大河内 直彦; 小川 奈々子; 力石 嘉人
科学通信 分子で地球を読む(No.2)琵琶湖の富栄養化と生態系の変化
科学, Jul. 2011
81, 7, 621, 623

高野 淑識; 野牧 秀隆; 大河内 直彦
海底下に棲息する微生物の代謝を in-situ ^<13>C-tracer 法で解明する
Isotope news, 01 Apr. 2011
684, 8, 13

Kuroda Junichiro; Hori Rie; Suzuki Katsuhiko; Ohkouchi Naohiko
Marine osmium isotope record across the Triassic-Jurassic boundary from a Pacific pelagic site
Annual Meeting of the Geological Society of Japan, 2011
2011, 0, 52, 52

大河内直彦; 内藤裕一; 力石嘉人; 米田 穣
縄文人の食性：新しい方法論からの視点　　　　　　　　　　　　　　　
科学, 2011
81, 11, 1116, 1117

Yamaguchi Yasuhiko; Takano Yoshinori; Chikaraishi Yoshito; Ogawa Nanako; Imachi Hiroyuki; Suga Hisami; Yokoyama Yusuke; Ohkouchi Naohiko
Nitrogen isotopic signatures of amino acids in microbes: culture experiments and applications to marine sediments
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2011
58, 0, 92, 92

長谷川尚志; 力石嘉人; 小川奈々子; 大河内直彦; 陀安一郎
陸域腐食食物網へのアミノ酸窒素同位体比の適用　　　　　　　　　　　　　　　
日本生態学会第58回大会, 2011

Akiko Makabe; Keisuke Koba; Chikage Yoshimizu; Ichiro Tayasu; Nanako O. Ogawa; Naohiko Ohkouchi; Sakae Toyoda; Toshi Nagata; Naohiro Yoshida
Oxygen isotopic composition of nitrous oxide produced in Lake Biwa　　　　　　　　　　　　　　　
International symposium on isotope ecology 2010 in Kyoto: Relationship between biodiversity and ecosystem function, 2011

高野淑識; 大河内直彦
Deep biosphere and its biogeochemical processes: a linkage between past and present microbes in sub‐seafloor
地球化学, 25 Dec. 2010
44, 4, 185, 204

高野淑識; 大河内直彦
「初期太陽系物質科学の最前線」有機分子で探る母天体の物質進化:特に水質変成と分子非対称性の共進化
日本惑星科学会誌 遊・星・人, 25 Dec. 2010
19, 4, 254, 267

CHIKARAISHI Yoshito; OGAWA Nanako O; TAKANO Yoshinori; TSUCHIYA Masashi; OHKOUCHI Naohiko
Food chain analysis by nitrogen isotopic composition of amino acids(Geochemistry of organic matter, microbes, and ecosystem)
地球化学, 25 Dec. 2010
44, 4, 233, 241

TAKANO Yoshinori; CHIKARAISHI Yoshito; OHKOUCHI Naohiko
Quality control by wet chemical pre-treatment for precise compound-specific isotope analysis
Researches in organic geochemistry, 24 Dec. 2010
26, 81, 93

大河内 直彦; 黒田 潤一郎
海洋無酸素事変--地球のダイナミックな営みを探る (特集 恐竜の進化とその時代)
科学, Nov. 2010
80, 11, 1117, 1123

Y. Kashiyama; N.O. Ogawa; S. Nomoto; H. Kitazato; N. Ohkouchi
Nitrogen and carbon isotopic compositions of copper nickel and vanadyl porphyrins in Cretaceous black shales　　　　　　　　　　　　　　　
In: N. Ohkouchi I. Tayasu K. Koba (eds.) Earth Life and Isotopes Kyoto University Press Kyoto, Aug. 2010
313, 335

N. Ohkouchi; Y. Chikaraishi; Y. Kashiyama; N.O. Ogawa
Isotopomers of chlorophyll nuclei: Theory and application　　　　　　　　　　　　　　　
In: N.Ohkouchi I. Tayasu K. Koba (eds.) Earth Life and Isotopes Kyoto University Press Kyoto, Aug. 2010
271, 290

J. Kuroda; R. S. Hori; K. Suzuki; N. Ohkouchi
Marine osmium isotopic records in the Triassic-Jurassic deep-sea sediments of Panthalassa
GEOCHIMICA ET COSMOCHIMICA ACTA, Jun. 2010
74, 12, A549, A549

Tsuboi Misato; Sato Yoko; Hamana Noriaki; Nakamura Eiko; Majima Ryuichi; Kitazato Hiroshi; Suga Hisami; Chikaraishi Yoshito; Kato Kazuhiro; Wada Hideki; Ohkouchi Naohiko
Reconstruction of ancient cold-seep activities based on biomarkers : A case study of Lower Pleistocene Ofuna and Koshiba Formation, central Japan
Fossils, 2010
87, 0, 5, 21

Yamaguchi Yasuhiko; Takano Yoshinori; Chikaraishi Yoshito; Ogawa Nanako; Imachi Hiroyuki; Suga Hisami; Yokoyama Yusuke; Ohkouchi Naohiko
Nitrogen isotopic signature of amino acids in microbes: a novel tool in biogeochemistry
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2010
57, 0, 115, 115

SUGA Hisami; OGAWA Nanako; KASHIYAMA Yuichiro; OHKOUCHI Naohiko
Reconstruction of the environment on TL1, 2 and 3 in Japan Sea using nitrogen isotopic compositions in pheopigments
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2010
57, 0, 84, 84

Tsuchiya Masashi; Fujiwara Yoshihiro; Nomaki Hidetaka; Toyofuku Takashi; Yamamoto Hiroyuki; Maruyama Tadashi; Wada Eitaro; Chikaraishi Yoshito; Ohkouchi Naohiko; Takano Yoshinori; Ogawa Nanako; Fujikura Katsunori; Yoshida Takao; Kitamura Minoru; Lindsay Dhugal
Food web analyses of the marine ecosystems based on nitrogen isotope of amino acids
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2010
57, 0, 41, 41

長谷川尚志; 力石嘉人; 小川奈々子; 大河内直彦; 陀安一郎
食性指標としてのアミノ酸窒素安定同位体比の利用：土壌食物網研究への適用にむけて　　　　　　　　　　　　　　　
日本生態学会第57回大会, 2010

大河内 直彦; 柏山 祐一郎
Geochemistry of porphyrins as molecular markers of chlorophylls
News letter, Dec. 2009
19, 3, 142, 154

CHIKARAISHI Yoshito; TAKANO Yoshinori; OHKOUCHI Naohiko
GC/MS analysis of amino acids as pivaloyl/isopropylesters
Researches in organic geochemistry, 30 Nov. 2009
25, 61, 70

高取 惇哉; 大河内 直彦; 小川 奈々子; 田中 樹; 近藤 洋一; 幡野 恭子; 坂本 皆子; 大久保 智司; 宮下 英明
1A-14 「天狗の麦飯」微生物群集構造の深度別比較(口頭発表)
日本微生物生態学会講演要旨集, 21 Nov. 2009
25

O OGAWA Nanako; CHIKARAISHI Yoshito; OHKOUCHI Naohiko
Diet analysis based on the nitrogen isotopic composition of amino acids
臨床化学, 31 Jul. 2009
38, 3, 266, 271

H. Miyashita; S. Ohkubo; Y. Kashiyama; N. Ohkouchi
POSSIBLE CONTRIBUTION OF CHLOROPHYLL D ON COASTAL CARBON CYCLE
PHYCOLOGIA, Jul. 2009
48, 4, 85, 85

T. M. Quan; Y. Kashiyama; N. Ohkouchi; P. G. Falkowski
Using nitrogen cycle proxies to determine paleoenvironmental variables
GEOCHIMICA ET COSMOCHIMICA ACTA, Jun. 2009
73, 13, A1064, A1064

J. Kuroda; M. Tanimizu; R. S. Hori; K. Suzuki; N. O. Ogawa; M. L. G. Tejada; M. F. Coffin; R. Coccioni; N. Ohkouchi
Multiple eruptions of the Ontong Java Plateau as a trigger of the Cretaceous Oceanic Anoxic Event-1a
GEOCHIMICA ET COSMOCHIMICA ACTA, Jun. 2009
73, 13, A708, A708

Y. Sekine; K. Suzuki; R. Senda; E. Tajika; R. Tada; K. Goto; S. Yamamoto; N. Ohkouchi; N. O. Ogawa
Osmium evidence for relationship between atmospheric oxygenation and Paleoproterozoic glaciation
GEOCHIMICA ET COSMOCHIMICA ACTA, Jun. 2009
73, 13, A1193, A1193

Y. Chikaraishi; N. O. Ogaw; N. Ohkouchi
Compound-specific nitrogen isotope analysis of amino acids: Implications of aquatic food web studies
GEOCHIMICA ET COSMOCHIMICA ACTA, Jun. 2009
73, 13, A219, A219

Kuroda Junichiro; Suzuki Katsuhiko; Tanimizu Masaharu; Hori Rie; Tejada Maria Luisa L; Kashiyama Yuichiro; Ogawa Nanako; Ohkouchi Naohiko
Paleoenvironmental change during the mid-Cretaceous time
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2009
56, 0, 304, 304

Y. Takano; F. Inagaki; Y. Morono; N. O. Ogawa; H. Kitazato; N. Ohkouchi
Application of NMR to characterize Intact Polar Lipids in deep biosphere
GEOCHIMICA ET COSMOCHIMICA ACTA, Jul. 2008
72, 12, A927, A927

黒田 潤一郎; 谷水 雅治; 堀 利栄; 鈴木 勝彦; 小川 奈々子; 大河内 直彦
オントンジャワ海台火山活動と白亜紀の海洋環境変動
日本地球化学会年会要旨集, 2008
55, 0, 398, 398

Naito Y; Chikaraishi Y; Ohkouchi N; Yoneda M
Dietary reconstruction of Jomon hunter-gatherers based on nitrogen isotopic composition of amino acid　　　　　　　　　　　　　　　
The 4th International Symposium on Isotopomers (ISI 2008) Proceedings, 2008
4, 265, 267
[Reviewed]

永田俊; 大手信人; 大河内直彦; 木庭啓介; 眞壁明子; 吉田尚宏; 由水千景; 高津文人; 陀安一郎; 宮島利宏
各種安定同位体比に基づく流域生態系の健全性/持続可能性指標の構築 琵琶湖および琵琶湖集水域における有機物負荷と窒素循環:各種安定同位体比を用いた総合的な環境評価
研究領域「水の循環系モデリングと利用システム」第5回領域シンポジウム(平成15年度採択研究課題終了シンポジウム)講演要旨集 平成20年, 2008
74

大河内 直彦; 力石 嘉人; 小川 奈々子; 柏山 祐一郎; 菅 寿美; 北里 洋
クロロフィルのアイソトポマー：理論と実践
日本地球化学会年会要旨集, 2008
55, 0, 185, 185

Suga Hisami; Yokoyama Yusuke; Ogawa Nanako; Kitazato Hiroshi; Ohkouchi Naohiko
Reconstruction of paleohydrology in Japan Sea based on isotopic records in a sediment core recovered from off Akita
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2008
55, 0, 418, 418

A. Makabe; K. Koba; I. Tayasu; A, Kohzu; M. Itoh; C. Yoshimizu; N.O. Ogawa; N. Ohkouchi; S. Toyoda; N. Yoshida; T. Nagata
Dynamics of Nitrous Oxide in the Sewage-polluted River in Mongolia　　　　　　　　　　　　　　　
Asia Oceania Geosciences Society's 5th Annual Meeting, 2008

Y. Chikaraishi; Y. Kashiyama; N. Ohkouchi
藻類・植物・堆積物に含まれるクロロ色素・フェオ色素のHPLC/MSによる解析　　　　　　　　　　　　　　　
Researches in Organic Geochemistry, Dec. 2007
22, 43, 55

眞壁明子; 木庭啓介; 由水千景; 小川奈々子; 陀安一郎; KIM Chulgoo; 大河内直彦; 豊田栄; 吉田尚弘; 永田俊
安定同位体からみた琵琶湖における一酸化二窒素の生成機構
日本陸水学会大会講演要旨集, 10 Sep. 2007
72nd, 254

Kuroda J; Tanimizu M; Suzuki K; Tejada Marissa L. G; Ogawa N; Coffin Millard F; Kashiyama Y; Ohkouchi N
O-2 Contemporaneous massive volcanism and Aptian Oceanic Anoxlc Event-1a based on C, Pb and Os isotopic records
日本地質学会学術大会講演要旨, 01 Sep. 2007
114

CHIKARAISHI Yoshito; KASHIYAMA Yuichiro; OGAWA Nanako O; OHKOUCHI Naohiko
Stable Isotopes as Ecological Proxies : Compound-Specific Nitrogen Isotope Analysis of Amino Acids
Radioisotopes, 15 Aug. 2007
56, 8, 463, 477

Y. Chikaraishi; Y. Kashiyama; N. O. Ogawa; H. Kitazato; N. Ohkouchi
Stable nitrogen isotopic composition of amino acids: Implications for aquatic food web studies
GEOCHIMICA ET COSMOCHIMICA ACTA, Aug. 2007
71, 15, A170, A170

Y. Kashiyama; N. O. Ogawa; Y. Chikaraishi; S. Nomoto; R. Tada; H. Kitazato; N. Ohkouchi
Reconstruction of the past biogeochemical cycles based on compound-specific N and C isotopic analyses of sedimentary porphyrins
GEOCHIMICA ET COSMOCHIMICA ACTA, Aug. 2007
71, 15, A466, A466

眞壁明子; 木庭啓介; 陀安一郎; 高津文人; 伊藤雅之; 由水千景; 小川奈々子; 大河内直彦; 豊田栄; 吉田尚弘; 永田俊
モンゴル下水流入河川における硝化・脱窒の日変化~アイソトポマー比による解析~
日本生態学会大会講演要旨集, 19 Mar. 2007
54th, 270

大手信人; 大河内直彦; 木庭啓介; 由水千景; 高津文人; 陀安一郎; 永田俊
水の循環系モデリングと利用システム 各種安定同位体比に基づく流域生態系の健全性/持続可能性指標の構築 安定同位体比の微量・高速分析手法を駆使した流域環境の高密度・高精度診断
研究領域「水の循環系モデリングと利用システム」第4回領域シンポジウム(平成14年度採択研究課題終了シンポジウム)講演要旨集 平成19年, 2007
104

力石嘉人; 柏山祐一郎; 小川奈々子; 高野淑識; 菅寿美; 豊福高志; 富谷朗子; 北里洋; 大河内直彦
有機化合物の分子レベル安定窒素同位体比分析による地球環境解析―2:アミノ酸
日本地球化学会年会講演要旨集, 2007
54th, 158

眞壁明子; 木庭啓介; 由水千景; 陀安一郎; 金哲九; 小川奈々子; 大河内直彦; 豊田栄; 戸張賀史; 吉田尚弘; 永田俊
安定同位体からみた琵琶湖における一酸化二窒素生成・消滅機構
第6回SORSTジョイントシンポジウム講演要旨集 超微量物質の同定/認識の化学 平成19年, 2007
70

稲垣 史生; 諸野 祐樹; 益井 宣明; 寺田 武志; 井町 寛之; 布浦 拓郎; 小林 徹; 高見 英人; 高井 研; 小川 奈々子; 大河内 直彦; 小谷 亮介; 武内 理香; 戸丸 仁; 荻原 成騎; 吉岡 秀佳; 松本 良; 堀越 弘毅; 航海関係者および陸上研究者一同
2-25 地球深部探査船「ちきゅう」による下北沖慣熟掘削航海CK06-06速報 : 海底下生命圏を支えるエネルギー源は何か?(極限環境,口頭発表)
日本微生物生態学会講演要旨集, 2007
23

Takashima Reishi; Nishi Hiroshi; Okada Hisatake; Sakamoto Tatsuhiko; Ohkouchi Naohiko; Kawabe Fumihisa; Yamanaka Toshio; Hasegawa Takashi
High resolution analysis for the OAE 1b Paquier level in the Vocontian Basin, SE France
Annual Meeting of the Geological Society of Japan, 2007
2007, 0, 109, 109

N. Ohkouchi; Y. Kashiyama; J. Kuroda; N.O. Ogawa; H. Kitazato
An importance of cyanobacteria as a primary producer during Cretaceous Oceanic Anoxic Event 2　　　　　　　　　　　　　　　
Biogeosciences, Oct. 2006
3, 575, 605

Kuroda J; Tanimizu M; Ogawa N; Coffin M. F; Ohkouchi N.
O-8 Environmental changes during a Cretaceous oceanic anoxic event
Annual Meeting of the Geological Society of Japan, 08 Sep. 2006
113, 47, 47

Ohkouchi N; Kashiyama Y; Chikaraishi Y; Ogawa N. O; Kuroda J; Kitazato H
O-10 Reconstruction of surface ocean environment during the formation of black shales in the mid-Cretaceous based on sedimentary chlorophyll derivatives
日本地質学会学術大会講演要旨, 08 Sep. 2006
113

Sakuma H; Tada R; Kashiyama Y; Ohkouchi N; Ogawa N; Tajika E; Watanabe S; Yamamoto S
O-11 Lithostratigraphy and organic carbon isotope stratigraphy in the lowest Triassic pelagic sequence along Kiso River, Inuyama
日本地質学会学術大会講演要旨, 08 Sep. 2006
113

T. I. Eglinton; J. Hwang; N. Ohkouchi; R. Francois; D. Montlucon; S. Manganini
Particle properties and paleoceanographic proxies
GEOCHIMICA ET COSMOCHIMICA ACTA, Aug. 2006
70, 18, A155, A155

T. I. Eglinton; N. Ohkouchi; N. Drenzek; A. Dickens; G. Mollenhauer; E. Schefuss; A. Sessions; D. Montlucon; S. Sylva; J. M. Hayes
Multi-isotopic constraints on the origin and fate of n-alkyl lipids in recent sediments
GEOCHIMICA ET COSMOCHIMICA ACTA, Aug. 2006
70, 18, A156, A156

N. Ohkouchi; Y. Kahiyama; Y. Chikaraishi; N. O. Ogawa; R. Tada; H. Kitazato
Nitrogen isotopic composition of chlorophylls and porphyrins in geological samples as tools for reconstructing paleoenvironment
GEOCHIMICA ET COSMOCHIMICA ACTA, Aug. 2006
70, 18, A452, A452

Y. Kashiyama; N. O. Ogawa; Y. Chikaraishi; H. Suga; R. Tada; H. Kitazato; N. Ohkouchi
Nitrogen and carbon isotopic analyses on sedimentary porphyrins of organic-rich shales from Miocene and mid-Cretaceous
GEOCHIMICA ET COSMOCHIMICA ACTA, Aug. 2006
70, 18, A306, A306

Y. Chikaraishi; Y. Kashiyama; N. O. Ogawa; H. Kitazato; S. Nomoto; N. Ohkouchi
Stable nitrogen isotope analysis of chlorophylls by gas chromatography-isotope ratio mass spectrometry
GEOCHIMICA ET COSMOCHIMICA ACTA, Aug. 2006
70, 18, A100, A100

鈴木彌生子; 力石嘉人; 小川奈々子; 大河内直彦; 伊永隆史
国産コシヒカリの多元素安定同位体比分析と産地特定の可能性
分析化学討論会講演要旨集, 29 Apr. 2006
67th, 45

眞壁明子; 木庭啓介; 由水千景; 陀安一郎; 金てつ九; 小川奈々子; 大河内直彦; 豊田栄; 戸張賀史; 吉田尚弘; 永田俊
安定同位体を用いた琵琶湖における亜酸化窒素生成・消費メカニズムの解析
日本生態学会大会講演要旨集, 24 Mar. 2006
53rd, 275

N. Ohkouchi; Y. Nakajima; N.O. Ogawa; H. Suga; Y. Kashiyama; K. Matsumoto; Y. Chikaraishi; K. Oguri; H. Kitazato
Stable carbon and nitrogen compositions of photosynthetic pigments as tracers for elemental cycle in the modern- and paleo-environments　　　　　　　　　　　　　　　
Frontier Research on Earth Evolution, 2006
2, 1, 4

Kashiyama Yuichiro; Ogawa Nanako O; Chikaraishi Yoshito; Suga Hisami; Nomoto Shinya; Tada Ryuji; Kitazato Hiroshi; Ohkouchi Naohiko
Nitrogen and carbon isotopic analyses on sedimentary porphyrins as a proxy for the paleo-photoautotrophs
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2006
53, 0, 20, 20

Chikaraishi Yoshito; Kashiyama Yuichiro; Tada Yohei; Toyohuku Takashi; Ogawa Nanako; Kitazato Hiroshi; Ohkouchi Naohiko
Compound-specific stable nitrogen isotope analysis of amino aicds by GC/C/IRMS: elucidation for biological isotopic fractionation of amino acid nitrogen and its application for ecological studies
Abstracts of Annual Meeting of the Geochemical Society of Japan, 2006
53, 0, 231, 231

Kuroda J; Ogawa N; Tanimizu M; Coffin M. F; Kitazato H; Ohkouchi N
Messive volcanism as a causal mechanism for a Cretaceous oceanic anoxic event
日本地質学会学術大会講演要旨, 10 Sep. 2005
112

真壁明子; 木庭啓介; 由水千景; 陀安一郎; 金てつ九; 小川奈々子; 大河内直彦; 豊田栄; 戸張賀史; 吉田尚弘; 永田俊
安定同位体比による琵琶湖窒素循環の解釈
日本陸水学会大会講演要旨集, 10 Sep. 2005
70th, 196

TI Eglinton; G Mollenhauer; NJ Drenzek; N Ohkouchi; D Montlucon; JM Hayes
Probing age relationships between sedimentary organic components via molecular-level radiocarbon analysis.
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, Mar. 2005
229, U888, U888

真壁明子; 木庭啓介; 由水千景; 高津文人; 小川奈々子; 大河内直彦; 金哲九; 小林由紀; 吉田尚弘
安定同位体比を用いた都市河川における窒素化合物の挙動解明
日本生態学会大会講演要旨集, 2005
52nd

N Ohkouchi; Y Nakajima; H Okada; H Kitazato
Copper-chelated bacteriochlorophyll e homologues in sediment from an anoxic lake (Lake Abashiri, Japan)
ORGANIC GEOCHEMISTRY, 2005
36, 11, 1576, 1580

TACHIBANA Shogo; HIRAI Takemaru; GOTO Kazuhisa; YAMAMOTO Shinji; TADA Ryuji; TAJIKA Eiichi; KIRSCHVINK Joseph L; KOPP Robert E; OHKOUCHI Naohiko; ISOZAKI Yukio; KITA Noriko T; SHIMODA Hajime; MORISHITA Yuichi
Sulfur Isotopic Compositions of Sulfides from the Huronian Supergroup, Ontario, Canada
日本鉱物学会・学術講演会,日本岩石鉱物鉱床学会学術講演会講演要旨集, 22 Sep. 2004
2004

Kuroda J; Ogawa N; Tokuyama H; Suga H; Matsumoto K; Taira A; Ohkouchi N
O-100 Lamina-scale variations in carbon isotopic compositions of organic matter during Oceanic Anoxic Event-2(OAE-2)
日本地質学会学術大会講演要旨, 10 Sep. 2004
111

TI Eglinton; G Mollenhauer; N Ohkouchi; JM Hayes
Advective controls on the distribution and composition of organic matter in marine sediments
GEOCHIMICA ET COSMOCHIMICA ACTA, Jun. 2004
68, 11, A342, A342

NAGANO Tadahiro; EZAKI Yoichi; OHKOUCHI Naohiko; SUGA Hisami; LIU Jianbo; ADACHI Natsuko
P-88 Microbes and biomakers of lowest Triassic thrombolites in Guizhou, China
Annual Meeting of the Geological Society of Japan, 2004
2004, 0

Goto K; Kirschvink J. L; Tachibana S; Ohkouchi N; Tajika E; Tada R; Yamamoto S; Hirai T; Ogawa N; Isozaki Y
P-63 Carbon Isotope study of the Espanola Formation, Huronian Supergroup, Ontario, Canada
Annual Meeting of the Geological Society of Japan, 2004
2004, 0

KE Yamaguchi; BL Beard; CM Johnson; N Ohkouchi; H Ohmoto
Iron isotope evidence for redox stratification of the Archean oceans
GEOCHIMICA ET COSMOCHIMICA ACTA, Sep. 2003
67, 18, A550, A550

K Matsumoto; H Suga; NO Ogawa; H Kitazato; N Ohkouchi
Biogeochemical implication of carbon isotopic compositions of sedimentary biomarkers from a meromictic lake
GEOCHIMICA ET COSMOCHIMICA ACTA, Sep. 2003
67, 18, A279, A279

Y Nakajima; H Okada; K Oguri; H Suga; H Kitazato; N Ohkouchi
Distribution of chloropigments in a meromictic lake, Lake Kaiike, Japan
GEOCHIMICA ET COSMOCHIMICA ACTA, Sep. 2003
67, 18, A324, A324

J Kuroda; H Tokuyama; NO Ogawa; K Matsumoto; H Suga; N Ohkouchi
High-resolution isotopic record of total organic carbon in Cretaceous black shales
GEOCHIMICA ET COSMOCHIMICA ACTA, Sep. 2003
67, 18, A241, A241

TI Eglinton; N Ohkouchi; G Mollenhauer; RR Schneider; LD Keigwin; JM Hayes
Temporal and spatial offsets in molecular proxy records induced by sediment redistribution.
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, Aug. 2002
224, U588, U588

池原実; 竹本紀之; 大河内直彦; 河村公隆
Latitudinal distributions of polycyclic aromatic hydrocarbons in the Southern Ocean surface sediments.
地球化学, 20 Jun. 2001
35, 2, 73, 84

M Ikehara; K Kawamura; N Ohkouchi; M Murayama; T Nakamura; A Taira
Variations of terrestrial input and marine productivity in the Southern Ocean (48 degrees S) during the last two deglaciations
PALEOCEANOGRAPHY, Apr. 2000
15, 2, 170, 180

Y. Ternois; K. Kawamura; N. Ohkouchi; L. Keigwin
Alkenone sea surface temperature in the Okhotsk Sea for the last 15 kyr
Geochemical Journal, 2000
34, 4, 283, 293

N Ohkouchi; K Kawamura; H Kawahata; H Okada
Depth ranges of alkenone production in the central Pacific Ocean
GLOBAL BIOGEOCHEMICAL CYCLES, Jun. 1999
13, 2, 695, 704

N Ohkouchi; K Kawamura; Y Kajiwara; E Wada; M Okada; T Kanamatsu; A Taira
Sulfur isotope records around Livello Bonarelli (northern Apennines, Italy) black shale at the Cenomanian-Turonian boundary
GEOLOGY, Jun. 1999
27, 6, 535, 538

Matsunaga Sou; Kawamura Kimitaka; Nakatsuka Takeshi; Ohkouchi Naohiko
Preliminary study on laboratory photochemical formation of low molecular weight dicarboxylic acids from unsaturated fatty acid (oleic acid)
Researches in Organic Geochemistry, 1999
14, 19, 26

大河内直彦; 河村公隆
Environments of Ocean and Primary Productivity during the Late Quaternary. Biomarkers as Tools for Reconstructing Paleoenvironments.
地学雑誌, Apr. 1998
107, 2, 189, 202

Ohkouchi N.
1. Climatic valiabilities in Quaternary : Summary
日本地質学会学術大会講演要旨, 20 Mar. 1998
105, 32, 32

N Ohkouchi; K Kawamura; H Kawahata; A Taira
Latitudinal distributions of terrestrial biomarkers in the sediments from the Central Pacific
GEOCHIMICA ET COSMOCHIMICA ACTA, May 1997
61, 9, 1911, 1918

Ikehara minoru; Kawamura Kimitaka; Ohkouchi Naohiko; Kimoto Katsunori
Alkenone sea surface temperatures in the Southern Ocean
Summaries of Researches using AMS at Nagoya University, Mar. 1997
8, 81, 90

大河内直彦; 和田英太郎; 河村公隆; 平朝彦
Ocean environment in Western Pacific Ocean. Relationship between alkenon output and nitrogen isotope ratio.
月刊海洋, Aug. 1996
28, 8, 493, 497

大河内直彦; 河村公隆; 中村俊夫; 平朝彦
Record retained in organic molecules for the passt 20,000 years.
月刊海洋, Jul. 1994
26, 7, 415, 419

Ohkouchi N.; Kawamura K.; Taira A.
10. Paleoenvironment revoeled from organic matter contained in the deep sea sediment
日本地質学会学術大会講演要旨, 25 Mar. 1993
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大河内 直彦; 山福 朱実
石油のものがたり
福音館書店, 2017

大河内 直彦
チェンジング・ブルー : 気候変動の謎に迫る
岩波書店, 2015
9784006032807

大河内 直彦
地球の履歴書
新潮社, 2015
9784106037764

小川 奈々子; 王 暁水; 篠原 宏文; 大河内 直彦
安定同位体比精密測定のためのマニュアル : Accurate measurements of carbon and nitrogen stable isotope ratio by EA/IRMS
日本分析センター, 2013
9784907305000

大河内 直彦
「地球のからくり」に挑む
新潮社, 2012
9784106104725

鳥海 光弘; 田近 英一; 吉田 茂生; 住 明正; 和田 英太郎; 大河内 直彦; 松井 孝典
地球システム科学
岩波書店, 2010
9784000069922

大河内 直彦; 陀安 一郎; 木庭 啓介
Earth, life, and isotopes
Kyoto University Press, 2010
9784876989607

大河内 直彦
チェンジング・ブルー : 気候変動の謎に迫る
岩波書店, 2008
9784000062442

川幡 穂高; 横山 祐典; 鈴木 淳; 小田 啓邦; 大河内 直彦; 木元 克典; DeDeckker P; Hantoro Wahyoe S
熱帯域の高精度環境復元と高緯度氷床と低緯度域環境とのリンケージの評価
川幡穂高, 2008