*Yoichi Usui¹, Manabu Nishizawa¹, Masafumi Saitoh¹, Kenichiro Tani², Takazo Shibuya¹, Tomoyo Okumura¹ (1.Japan Agency for Marine-Earth Science and Technology, 2.National Museum of Nature and Science)

*Koichiro Fujinaga^1,2, Kazutaka Yasukawa^2,1, Shiki Machida^3,2, Tatsuo Nozaki^3,2, Yutaro Takaya^4,2, Junichiro Ohta², Kazutaka Oya², Daiki Niikuma⁴, Yoshiro Nishio⁵, Yuka Masaki³, Yoichi Usui³, Satoru Haraguchi³, Koichi Iijima³, Hiroshi Amakawa³, Katsuhiko Suzuki³, Kentaro Nakamura^2,3, Yasuhiro Kato^2,3,1, MR15-E02 Leg.2 cruise members (1.Chiba Institute of Technology, 2.Department of Systems Innovation, School of Engineering, University of Tokyo, 3.Japan Agency for Marine-Earth Science and Technology, 4.Department of Resources and Environmental Engineering School of Creative Science and Enginerring, Waseda University, 5.Research and Education Faculty, Kochi University)

*Masanobu Yamamoto¹, Yoichi Usui², Uramoto Go-Ichiro², Takuto Ando³, Steven Clemens⁴, Kuhnt Wolfgang⁵, Leah LeVay⁶, IODP Exp 353 Scientists (1.Faculty of Environmental Earth Science, Hokkaido University, 2.JAMSTEC, 3.Graduate School of Science, Hokkaido University, 4.Brown University, 5.Christian-Albrechts-Universitat zu Kiel, 6.Texas A&M University)