*Ikshu Gautam¹, Tetsuya Yokoyama¹, Akira Ishikawa¹, Tatsuya Tamura¹, Tsuyoshi Komiya² (1.Institute of Science Tokyo, 2.The University of Tokyo)

*Takaaki Arai¹, Hirochika Sumino², Naoto Hirano⁵, Shiki Machida⁴, Akira Ishikawa³, Norikatsu Akizawa⁶ (1.School of Science, The University of Tokyo, 2.Research Center for Advanced Science and Technology, The University of Tokyo, 3.Department of Earth and Planetary Sciences, School of Science, Institute of Science Tokyo, 4.Ocean Resource Research Center for Next Generation, Chiba Institute of Technology, 5.Center for Northeast Asian Studies Tohoku University, 6.Hiroshima University)

*Tetsu Kogiso¹, Akira Ishikawa², Norikatsu Akizawa³ (1.Kyoto University, 2.Institute of Science Tokyo, 3.Hiroshima University)

*Rentaro Takahashi¹, Akira Ishikawa¹, Tetsuya Yokoyama¹, Teruaki Ishii² (1.Institute of Science Tokyo, 2.Shizuoka University)

*Yuya Sugiyama¹, Akira Ishikawa¹, Tetsuya Yokoyama¹ (1.Department of Earth and Planetary Sciences, School of Science, Institute of Science Tokyo)

Hidetoshi Mori¹, *Akira Ishikawa¹, Tetsuya Yokoyama¹, Tetsu Kogiso², Norikatsu Akizawa³ (1.Department of Earth and Planetary Sciences, Institute of Science Tokyo, 2.Graduate School of Human and Environmental Studies, Kyoto University, 3.Graduate School of Human and Environmental Studies, Kyoto UniversityEarth and Planetary System Science, Hiroshima University)

*Kazuto Mikuni^1,2, Akira Ishikawa^1,3, Ryu Sato¹ (1.Department of Earth and Planetary Sciences, Institute of Science Tokyo, 2.Geological Survey of Japan, AIST, 3.JAMSTEC)

*Kyoko Okino¹, Shiki Machida², Tomoaki Morishita³, Katsuyoshi Michibayashi⁴, Akira Ishikawa⁵, Naoto Hirano⁶, Yibing Li⁷, Masakazu Fujii⁸, Nobukazu Seama⁹, Yuki Minegishi¹, Takuya Yahagi¹, Michinari Sunamura¹⁰, Akiko Makabe¹¹, Scientific Team KH-24-4 (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Chiba Institute of Technology , 3.Kanazwa University , 4.Nagoya University, 5.Institute of Science Tokyo, 6.Tohoku University , 7.Chinese Acaemy of Geological Science, 8.National Institute of Polar Research, 9.Kobe University , 10.The University of Tokyo, 11.Japan Agency for Marine-Earth Science and Technology )

*Kohei Nimura¹, Shiki Machida², Norikatsu Akizawa³, Aoi Harada¹, Naoto Hirano⁴, So Inoue¹, Akira Ishikawa⁵, Kazuki Matsuyama ^1,6, Katsuyoshi Michibayashi^1,7, Tomoaki Morishita⁸, Taiki Nakano⁹, Yuka Niwa⁵, Makoto Sano⁹, Yibing Li¹⁰, Kyoko Okino¹¹ (1.Department of Earth and Planetary Sciences, GSES, Nagoya University, 2.Ocean Resources Research Center for Next Generation, Chiba Institute of Technology, 3.Graduate School of Advanced Science and Engineering, Hiroshima University, 4.Center for Northeast Asian Studies, Tohoku University, 5.Department of Earth and Planetary Science, School of Science, Institute of Science Tokyo, 6.Géosciences Montpellier, CNRS, Université Montpellier 2, 7.Volcanoes and Earth's Interior Research Center, IMG, JAMSTEC, 8.College of Science and Engineering, Kanazawa University, 9.Graduate School of Science, Tohoku University, 10.Institute of Geology, Chinese Academy of Geological Science, 11.Atmosphere and Ocean Research Institute, The University of Tokyo)

*Norikatsu Akizawa¹, Akira Ishikawa², Yuka Niwa², Olivier Alard³, Yoann Greau³, Naoto Hirano⁴, Shiki Machida⁵ (1.Earth Planet Sys Sci, Hiroshima Uni, 2.Sci Tokyo, 3.ANU, 4.Tohoku Uni, 5.Chiba Tech)

*Yuka Niwa¹, Michiro Tsuguchi², Saori Tsuguchi², Sui Amano³, Norikatsu Akizawa⁴, Akira Ishikawa¹ (1.Earth and Planetary Science, Institute of Science Tokyo, 2.Criar LLC., 3.Japan Broadcasting Corporation, 4.Earth and Planetary System Science, Hiroshima University)