Deepest scientific ocean drilling GUINNESS WORLD RECORDS™ CERTIFICATION
The total drill pipe length of 7,906 m achieved by Deep-Sea Scientific Drilling Vessel “Chikyu” has been certified by Guiness World Records as the “deepest scientific ocean drilling”.
The Japan Agency for Marine-Earth Science and Technology (JAMSTEC) (President: Hiroyuki Yamato) (hereinafter referred to as “JAMSTEC”) and Mantle Quest Japan Company Ltd. (President ＆ Representative Director: Hiroyasu Ishiguro) has been awarded the Guinness World Records certification for the “Deepest scientific ocean drilling” with a total drill pipe length of 7,906 meters accomplished aboard Deep-Sea Scientific Drilling vessel “Chikyu”. This certifies that IODP (International Ocean Discovery Program)*1 Expedition 405 (Tracking Tsunamigenic Slip Across the Japan Trench: JTRACK) achieved a total drill pipe length of 7,906 meters during its simultaneous Logging While Drilling (LWD)*2 operations, establishing the world record for the “deepest scientific ocean drilling” (previously reported on 20 December 2024).
This record demonstrates the high technical capabilities achieved through the collaboration between JAMSTEC and Japan Mantle Quest Ltd., which operates “D/V Chikyu”. We are pleased to announce that this achievement has been recognized today by Guinness World Records, and the related certificate has been awarded.
International Ocean Discovery Program (IODP)
A multinational scientific research cooperation project launched in October 2013. The project aims to elucidate global environmental changes, the Earth's internal structure, and life cycles in the Earth's crust by drilling the deep ocean floor using drilling vessels provided by Japan (Chikyu), the United States (JOIDES Resolution), and Europe (Mission-Specific Platforms). The project ended in September 2024, but a new project centered on Japan and Europe has begun from 2025 as the International Ocean Drilling Programme (IODP3).
Logging-While-Drilling
Logging-While-Drilling is a survey using various types of geophysical measurement sensors mounted near the drill bit at the bottom of the drill string. These measure the physical properties of the formation at the same time as drilling, and transmit the data to the vessel in real time.
