*Mari Hamahashi¹, Hironori Otsuka¹, Yoshiaki Suzuki², Jun Arimoto², Yuzuru Yamamoto^1,3, Nobukazu Seama^1,3, Stephen Bowden^4,1, Tetsuo Matsuno¹, Hiroko Sugioka^1,3, Satoshi Shimizu^1,5, Hikaru Iwamaru^1,5, Mamoru Sano^1,5, Keita Suzuki^1,5, Katsuya Kaneko^1,3, Kazuo Nakahigashi⁶, Yoshiyuki Tatsumi¹ (1.Kobe University, Ocean-Bottom Exploration Center, 2.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 3.Department of Planetology, Graduate School of Science, Kobe University, 4.School of Geosciences, University of Aberdeen, 5.Nippon Marine Enterprises, Ltd., 6.School of Marine Resources and Environment, Tokyo University of Marine Science and Technology)

*Kenichiro Tani¹, Osamu Ishizuka², Hiroki Minami⁶, Teruki Oikawa², Hajime Katayama², Yoshiaki Suzuki², Taketo Shimano³, Masashi NAGAI⁴, Fukashi Maeno⁵, Michihiko Nakamura⁷, Naoto Jimi⁸, Takashi Sano¹ (1.National Museum of Nature and Science, 2.National Institute of Advanced Industrial Science and Technology, 3.Tokoha University, 4.National Research Institute for Earth Science and Disaster Prevention, 5.University of Tokyo, 6.Japan Coast Guard Academy, 7.Tohoku University, 8.Nagoya University)

*Yoshiaki Suzuki¹, Takuya Itaki¹, Hajime Katayama¹, Naotomo Kaneko¹ (1.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology)