*Yasuhiro Kato^1,2,3, Koichiro Fujinaga^3,1, Kentaro Nakamura^1,2, Kazutaka Yasukawa^1,3, Junichiro Ohta¹, Yutaro Takaya^4,1, Koichi Iijima², Shiki Machida^2,1, Tatsuo Nozaki^2,1, Jun-Ichi Kimura², Katsuhiko Suzuki², Hikaru Iwamori^2,5 (1.Department of Systems Innovation, Graduate School of Engineering, University of Tokyo, 2.Japan Agency for Marine-Earth Science and Technology, 3.Chiba Institute of Technology, 4.Department of Resources and Environmental Engineering School of Creative Science and Enginerring, Waseda University, 5.Tokyo Institute of Technology)

*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)

*Junichiro Ohta^1,2, Kentaro Nakamura², Kazutaka Yasukawa^2,3, Koichiro Fujinaga^3,2, Koichi Iijima¹, Hikaru Iwamori^1,4, Yasuhiro Kato^2,1,3 (1.Japan Agency for Marine-Earth Science and Technology, 2.School of Engineering, the University of Tokyo, 3.Chiba Institute of Technology, 4.Graduate School of Engineering, Tokyo Institute of Technology)

*Koichi Iijima^1,2, Yuka Masaki^1,2, Blair Thornton³, Akira Usui⁴, Keisuke Nishi⁵, Katsuhiko Suzuki^1,2, Kazuya Kitada^1,2, Junji Kaneko^1,2, Cruise members of YK15-15, Cruise members of NT13-13, Cruise members of KR15-E01, Cruise members of KR16-01 (1.Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology, 2.Project Team for Development of New-generation Research Protocol for Submarine Resources, Japan Agency for Marine-Earth Science and Technology, 3.Institute of Industrial Science, The University of Tokyo, 4.Science Research Center, Kochi University, 5.Graduate school of Integrated Arts and Sciences, Kochi University)