*Yoichi Usui¹, Toshitsugu Yamazaki², Junichiro Ohta^3,4,1, Honami Sato⁴, Akira Ishikawa⁵ (1.Japan Agency for Marine-Earth Science and Technology, 2.Atmosphere and Ocean Research Institute, The University of Tokyo, 3.FRCER, The University of Tokyo, 4.ORCeNG, Chiba Institute of Technology, 5.Department of Earth and Planetary Sciences, Tokyo Institute of Technology)

*Yusuke Kuwahara¹, Kazutaka Yasukawa^2,1,3, Koichiro Fujinaga^3,2, Tatsuo Nozaki^4,2,5,3, Junichiro Ohta^2,3,6, Honami Sato^3,4, Jun-Ichi Kimura⁶, Kentaro Nakamura¹, Yasuhiro Kato^2,1,3,4 (1.Department of Systems Innovation, School of Engineering, The University of Tokyo, 2.Frontier Research Center for Energy and Resources, School of Engineering, The University of Tokyo, 3.Ocean Resources Research Center for Next Generation, Chiba Institute of Technology, 4.Submarine Resources Research Center, Japan Agency for Marine-Earth Science and Technology, 5.Department of Planetology, Graduate School of Science, Kobe University, 6.Volcanos and Earth’s Interior Research Center, Research Institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology)

*Yuki Tomimatsu¹, Tatsuo Nozaki^2,3,4,5, Honami Sato⁵, Yutaro Takaya⁶, Jun-Ichi Kimura⁷, Chang Qing⁷, Hiroshi Naraoka⁸, Manuel Rigo⁹, Tetsuji Onoue⁸ (1.Graduate school of Science and Technology, Kumamoto University, 2.Submarine Resources Research Center, Research Institute for Marine Resources Utilization, Japan Agency for Marine-Earth Science and Technology, 3.Frontier Research Center for Energy and Resources (FRC- ER), Graduate School of Engineering, Tokyo University, 4.Department of Planetology, Graduate School of Science, Kobe University, 5.Ocean Resources Research Center for Next Generation, Chiba Institute of Technology, 6.Department of Resources and Environmental Engineering School of Creative Science and Enginerring, Waseda University, 7.Department of Solid Earth Geochemistry, Japan Agency for Marine-Earth Scienc and Technology, 8.Department of Earth and Planetary Sciences, Faculty of Sciences, Kyushu University, 9.Department of Geosciences, University of Padova)