*Motoo Ito¹, Yoshinori Takano², Takuji Ohigashi³, Hayato Yuzawa³, Yoko Kebukawa⁴, Kento Kiryu⁴, Masayuki Uesugi⁵, Naotaka Tomioka¹, Yu Kodama⁷, Hiroshi Naraoka⁶, Toru Yada⁸, Masanao Abe⁸ (1.Kochi Institute for Core Sample Research, JAMSTEC, 2.Biogeochemistry Program, JAMSTEC, 3.UVSOR, Institute for Molecular Science, 4.Yokohama National University, 5.JASRI, 6.Kyushu University, 7.Marine Works Japan, 8.JAXA)

*Hiroshi Naraoka¹, Yoshinori Takano², Nanako O. Ogawa², Minako Hashiguchi¹, Hannah L. McLain³, Eric T. Parker³, Kenji Hamase¹, Francois-Régis Orthous-Daunay⁴, Junko Isa⁴, Dan Aoki⁵, Kazuhiko Fukushima⁵, Philip Schmitt-Kopplin⁶, Jason P. Dworkin³, SOM Analysis Team (1.Kyushu University, Japan, 2.Japan Agency for Marine-Earth Science Technology, Japan, 3.NASA Goddard Space Flight Center, USA, 4.Université Grenoble Alpes, France, 5.Nagoya University, Japan, 6.Helmholtz Zentrum Muenchen, Germany)

*Hiroshi Naraoka¹ (1.Department of Earth and Planetary Sciences, Kyushu University)

*Minako Hashiguchi¹, Hiroshi Naraoka^1,2 (1.Research Center for Planetary Trace Organic Compounds, Kyushu University , 2.Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University)

*Keisuke Muneishi¹, Hiroshi Naraoka¹ (1.Kyushu University)

*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)