OGURI Kazumasa, Senior Research Scientist

Department of Marine Biodiversity Research (main)

Instrumentation and Robotics Group,
Department of Engineering for Geo-Marine Sciences
Marine Technology and Engineering Center (sub1)

Research Unit for Ecosystem Monitoring,
Project Team for Analyses of Changes in East Japan Marine Ecosystems (sub2)

Japan Agency for Marine-Earth Science and Technology

2-15 Natsushima, Yokosuka
Kanagawa, 237-0061 Japan

Research gate

[English / 日本語]
  • Ph.D. Nagoya University, on Feb.2001.
    Thesis title "Sedimentary processes and paleoenvironmental changes of the East China Sea"
  • Ph.D. student, Nagoya University, Hydrospheric-Atmospheric Sciences, Apr.1995 - Mar.1999.
  • M.Sc. student, Nagoya University, Hydrospheric-Atmospheric Sciences, Apr.1993 - Mar.1995.
  • B.Sc. student, Shizuoka University, Geoscience, Apr.1989 - Mar.1993.

  • Research and professional experience:
  • Senior Research Scientist, JAMSTEC, Apr.2009 - present.
  • Research Scientist, JAMSTEC, Jul.2004 - Mar.2009.
  • Technical Researcher, JAMSTEC, Jun.2001 - Jun.2004.
  • Research Staff, Japan Marine Science Foundation, Apr.1999 - May.2001.

  • Research interests:
  • Modern sedimentary processes from meromictic lake to hemipelagic oceans.
  • Development of high precision planar O2 optodes and microelectrodes for in situ measurements.
  • Evaluation of recent sediment accumulation rates using natural and artificial radionuclides.

  • Selected publications:
  • Fujii, M., Oguri, K., Karai, K., Kasaya, T., Kawamura, K., Report: 210Pb and 137Cs profiles in surface sediments collected using a Remotely Operated Vehicle, off Sanriku, NE Japan, The Journal of Geological Society of Japan, in press, 2017 (in Japanese)
  • Koho, K.A., de Nooijer, L.J., Fontanier, C., Toyofuku, T., Oguri, K., Kitazato, H., Reichart, G-J., Benthic foraminiferal Mn/Ca ratios reflect microhabitat preferences, Biogeosciences, 14, 3067-3082, 2017 Open Access

  • 2016
  • Wenzhöfer, F., Oguri, K., Middelboe, M., Turnewitsch, R., Toyofuku, T., Kitazato, H., Benthic carbon mineralization in hadal trenches: Assessment by in situ O2 microprofile measurements. Deep-sea Research I, 116, 276-286.
  • Oguri, K., Furushima, Y., Toyofuku, T., Kasaya, T., Wakita, M., Watanabe, S., Fujikura, K., Kitazato, H., Long-term monitoring of bottom environments of the continental slope off Otsuchi Bay, northeastern Japan. Journal of Oceanography, 72,1,151-166,DOI:10.1007/s10872-015-0330-4, 2016.
  • Nomaki, H., Arai, K., Suga, H., Toyofuku, T., Wakita, M., Nunoura, T., Oguri, K., Kasaya, T., Watanabe, S. Sedimentary organic matter contents and porewater chemistry at upper bathyal depths influenced by the 2011 off the Pacific coast of Tohoku Earthquake and tsunami. Journal of Oceanography, 72, 1, 99-111, DOI:10.1007/s10872-015-0315-3, 2016.

  • 2015
  • Oguri, K., Yamamot, M., Toyofuku, T., Kitazato, H., Developments of deep-sea electronic circuits fixed with an epoxy resin. JAMSTEC Report of Research and Development, 21, 7-15, 2015. (in Japanese)

  • 2014
  • Toyofuku, T., Duros, P., Fontanier, C., Mamo, B., Bichon, S., Buscail, R., Chabaud, G., Defrandre, B., Goubet, S., Grémare, A., Menniti, C, Fujii, M., Kawamura, K., Koho, K. A., Noda, A., Namegaya, Y., Oguri, K., Radakovitch, O., Murayama, M., de Nooijer, L. J., Kurasaw, A., Ohkawara, N., Okutani, T., Sakaguchi, A., Jorissen, F., Reichart, G-J., Kitazato, H. Unexpected biotic resilience on the Japanese seafloor caused by the 2011 Tohoku-Oki tsunami, Scientific Reports, 4, 7517, doi:10.1038/srep07517, 2014. Open Access
  • Fontanier, C., Duros, P., Toyofuku, T., Oguri, K., Koho, K. A., Buscail, R., Gremare, A., Radakovitsch, O., Deflandre, B., de Nooijer, L. J., Bichon, S., Goubet, S., Ivanovshy, A., Chabaud, G., Menniti, C., Reichart, G-J., Kitazato, H., Living (stained) deep-sea foraminifera off Hachinohe (NE Japan, Western Pacific): Environmental interplay in oxygen-depleted ecosystems, Journal of Foraminiferal Research, 44, 3, 281-299, 2014.
  • Turnewitsch, R., Falahat, S., Stehiko, J., Oguri, K., Glud, R.N., Middelboe, M., Kitazato, H., Wenzhoefer, F., Ando, K., Fujio, S., Yanagimoto, D., Recent sediment dynamics in hadal trenches: evidence for the influence of higher-frequency (tidal, near-inertial) fluid dynamics, Deep-sea research I, 90, 125-138, 2014.
  • Tsuboi, T., Wada, H., Nakamura, T., Hang, T.T, Matsuzaki, H., Otsuji, N., Fujioka, K., Oguri, K., Kitazato, H. Deep-sea limestone block as source of 14C-depleted dissolved inorganic carbon at the Palau Trench. Chemical Geology, 364, 1-8, 2014.

  • 2013
  • Yamamoto, M., Nakamura, R., Oguri, K., Kawagucci, S., Suzuki, K., Hashimoto, K., Takai, K. Electricity generation and illumination via an environmental fuel cell in deep-sea hydrothermal vents. Angewandte Chemie International Edition, DOI: 10.1002/anie.201302704, 2013.
  • Oguri, K., Kawamura, K., Sakaguchi, A., Toyofuku, T., Kasaya, T., Murayama, M., Glud, R. N., Kitazato, H., Hadal disturbance in the Japan Trench induced by the 2011 Tohoku-Oki Earthquake. Scientific Reports, 3, 1915, DOI:10.1038/srep01915, 2013. Open Access
  • Glud, R. N., Wenzhöfer, F., Middelboe, M., Oguri, K., Turnewitsch, R., Canfield, D. E., Kitazato, H., High rates of microbial carbon turnover in sediments in the deepest oceanic trench on Earth. Nature Geoscience, 6, 284-288, DOI: 10.1038/NGEO1773, 2013.
  • Tsuchiya, M., Gooday, A.J., Nomaki, H.,Oguri, K., Kitazato, H., Genetic diversity and environmental preferences of monithalamous foraminifers revealed through clone analysis of environmental small-subunit ribosomal DNA sequences. Journal of Foraminiferal Research, 43, 1, 3-13, 2013.

  • 2012
  • Harada, N., Sato, M., Oguri, K., Hagino, K., Okazaki, Y., Katsuki, K., Tsuji, Y., Shin, K-H., Tadai, O., Saitoh, S., Narita, H., Konno, S., Jordan, R.W., Shiraiwa, Y., Grebmeier, J., Recent environmental changes enhance coccolithophorid blooms in the Bering Sea. Global Biogeochemical Cycles, 26, GB2036, doi:10.1029/2011GB004177, 2012.
  • Kiyokawa. S., Ninomiya, T., Nagata, T., Oguri, K., Ito, T., Ikehara, M., Yamaguchi, K.E., Effects of tides and weather on sedimentation of iron-oxyhydroxides in a shallow-marine hydrothermal environment at Nagahama Bay, Satsuma Iwo-Jima Island, Kagoshima, southwest Japan. Island Arc, 21,2,118-147, 2012.
  • Asahara, Y., Takeuchi, F., Nagashima, K., Harada, N., Yamamoto, K., Oguri, K., Tadai, O., Provenance of terrigenous detritus of the surface sediments in the Bering and Chukchi Seas as derived from Sr and Nd isotopes: implications for recent climate change in the Arctic regions. Deep-sea Research II, 61-64, 155-171, 2012.
  • Oguri, K., Harada, N., and Tadai, O., Excess 210Pb and 137Cs concentrations, mass accumulation rates, and sedimentary processes on the Bering Sea continental shelf. Deep-sea Research II, 61-64, 193-204, 2012.

  • 2011
  • Hunter, W., Oguri, K., Kitazato, H., Ansari, Z.A., and Witte, U., Epi-benthic megafauna zonation across an oxygen minimum zone at the Indian continental margin. Deep-sea Research I, 58, 6, 699-710, 2011.

  • 2010
  • Yamaguchi, K.E., Oguri, K., Ogawa, N.O., Sakai, S., Hirano, S., Kitazato, H., and Ohkouchi, N., Geochemistry of modern carbonaceous sediments overlain by photic zone anoxia developed in the salime meromictic Lake Kai-ike, southwest Japan: I. Early diagenesis of organic carbon, nitrogen, and phosphorus, Palaeogeog. Palaeoclimatol. Palaeoecol., 294,1-2,72-82, 2010.

  • 2009
  • Tada, Y., Fujikura, K., Oguri, K., Kiazato, H. and Tanabe, K., In situ fluorochrome calcein marking of deep-sea molluscs using a new growth chamber, Aquat Ecol. DOI:10.1007/s10452-009-9290-3, 2009.
  • Berg, P., Hume, A., Stahl, H., Oguri, K., Meyer, B. and Kiazato, H, Eddy correlation measurements of oxygen uptake in deep ocean sediments, Limnol. Oceanogr. Methods., 7, 576-584, 2009.
  • Glud, R.N., Thumdrup, B., Stahl, H., Wenzhöfer, F., Glud, A.N., Nomaki, H., Oguri, K., Revsbech, N.P. and Kitazato, Nitrogen cycling in a deep ocean margin sediment (Sagami Bay, Japan). Limnol. Oceanogr. , Limnol. Oceanogr., 54, 723-734, 2009.
  • Glud, R.N., Stahl, H., Berg, P., Wenzhöfer, F., Oguri, K., and Kitazato, H. Microscale patchiness in distribution and consumption of O2: A detailed in situ microsensor study of an ocean margin sediment. Limnolo. Oceanogr. , Limnol. Oceanogr., 54, 1-12, 2009.

  • 2008
  • de Nooijer, L.J., Toyofuku, T., Oguri, K., Nomaki, H., and Kitazato, H. Intracellular pH distribution in foraminifera determined by the fluorescent probe HPTS. Limnol. Oceanogr. Methods, 6, 610-618, 2008.

  • 2007
  • Takishita, K., Tsuchiya, M., Kawato, M., Oguri, K., Kitazato, H. and Maruyama, M. Genetic diversity of microbial eukaryotes in anoxic sediment of the saline meromictic lake Namako-ike (Japan): on the detection or anaerobic or anoxic-tolerant lineages of eukaryotes. Protist, 158, 1, 51-64, 2007.

  • 2006
  • Oguri, K., Kitazato, H. and Glud, R.N. Platinum octaetylporphyrin based planar optodes combined with an UV-LED excitation light source: an ideal tool for high-resolution O2 imaging in O2 depleted environments. Mar. Chem., 100, 95-106, 2006.
  • Middelboe, M., Glud, R.N., Wenzhöfer, F., Oguri, K., and Kitazato, H. Spatial distribution and activity of viruses in the deep-sea sediments in Sagami Bay, Japan. Deep-sea Res. I, 53, 1-13, 2006.

  • 2005
  • Glud, R.N., Wenzhöfer, F., Tengberg, A., Middelboe, M., Oguri, K., and Kitazato, H. Distribution of oxygen in surface sediments from central Sagami Bay, Japan: In situ measurements by microelectrodes and planar optodes. Deep-sea Res. I, 52, 1974-1987, 2005.
  • Ohkouchi, N., Nakajima, Y., Okada, H., Ogawa, N. O., Suga, H., Oguri, K. and Kitazato, H. Biogeochemical processes in the saline meromictic Lake Kaiike, Japan: Implications from molecular isotopic evidences of photosynthetic pigments Env. Microbiol., 7(7), 1009-1016, 2005.

  • 2004
  • Koizumi,Y., Kojima, H., Oguri, K., Kitazato, H. and Fukui, M. Distribution of chloropigments in suspended particulate matter and benthic microbial mat of a meromictic lake, Lake Kaiike, Japan. Env. Microbiol., 6(6), 622-637, 2004.

  • 2003
  • Nakajima, Y., Okada, H., Oguri, K., Suga, H., Kitazato, H., Koizumi, Y., Fukui, M. and Ohkouchi, N. Distribution of chloropigments in suspended particulate matter and benthic microbial mat of a meromictic lake, Lake Kaiike, Japan. Env. Microbiol., 5(11), 1103-1110, 2003.
  • Ujiié, Y., Ujiié, H., Taira, A., Nakamura, T. and Oguri, K. Spatial and temporal variability of surface water in the Kuroshio source region, Pacific Ocean, over the past 21,000 years; evidence from planktonic foraminifera. Mar. Micropal., 49, 335-364, 2003.
  • Oguri, K., Matsumoto, E., Yamada, M., Saito, Y. and Iseki, K. Sediment accumulation rates and budgets of depositing particles of the East China Sea. Deep-Sea Res. II, 50, 513-528, 2003.

  • Before 2003
  • Oguri, K., Matsumoto, E., Saito, Y., Honda, M. C., Harada, N. and Kusakabe, M. Evidence for the offshore transport of terrestrial organic matter due to the rise of sea level: the case of the East China Sea continental shelf. Geophys. Res. Lett., 27, 23, 3893-3896, 2000.
  • Saito, Y., Katayama, H., Ikehara, K., Kato, Y., Matsumoto, E., Oguri, K., Oda, M. and Yumoto, M. Transgressive and highstand system tracts and post-glacial transgression, the East China Sea. Sediment. Geol., 122, 217-232, 1998.

  • Patents:
  • Oguri, K., Observation Apparatus.Patent No. US 8,202,478 B2, Jun, 19, 2012
  • Oguri, K., Measuring apparatus for dissolved oxygen.EP2098862, Nov, 21, 2012

  • Updated on 6/Jul/2017

    Department of Marine Biodiversity Research
    Japan Agency for Earth-Marine Science and Technology