*Tomoya Obase¹, Hirochika Sumino², Kazuto Mikuni^1,3, Shiki Machida⁴, Naoto Hirano⁵ (1.Institute of Science Tokyo, 2.The University of Tokyo, 3.AIST, 4.Chiba Institute of Technology, 5.Tohoku University)

*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)

*Kohei Nimura¹, Takaaki Moriguchi², Norikatsu Akizawa³, Shiki Machida⁴, Kyoko Okino⁵, Katsuyoshi Michibayashi^1,6 (1.Department of Earth and Planetary Sciences, GSES, Nagoya University, 2.Kawasaki Geological Engineering Co., Ltd., 3.Graduate School of Advanced Science and Engineering, Hiroshima University, 4.Ocean Resources Research Center for Next Generation, Chiba Institute of Technology, 5.tmosphere and Ocean Research Institute, The University of Tokyo, 6.Volcanoes and Earth's Interior Research Center, IMG, JAMSTEC)

*Masakazu Fujii^1,2, Makoto Takeuchi³, Tomohiro Ito⁴, Norikatsu Akizawa⁴, Shiki Machida⁵, Chiori Tamura³, Masanari Ashida³, Kyoko Okino³ (1.National Institute of Polar Research, 2.The Graduate University for Advanced Studies, SOKENDAI, 3.Atmosphere and Ocean Research Institute, The University of Tokyo, 4.Hiroshima University, 5.Chiba Institute of Technology)

*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)

*Shiki Machida¹, Kana Ashida¹, Kyoko Okino² (1.Chiba Institute of Technology, 2.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)

*Keishiro Azami¹, Kanta Koyama², Takuya Saito³, Takazo Shibuya³, Shiki Machida¹, Yasuhiro Kato^4,1, Estuo Uchida² (1.Ocean Resources Research Center ofr Next Generation, Chiba Institute of Technology, 2.Faculty of Science and Engineering, Waseda University, 3.Institute for Extra-cutting-edge Science and Technology Avant-grade, Japan Agency for Marine–Earth Science and Technology, 4.Department of Systems Innovation, School of Engineering, The University of Tokyo)

Hanaya Okuda¹, *Yuya Akamatsu², Ikuo Katayama³, Shiki Machida⁴, Naoto Hirano⁵, Norikatsu Akizawa³ (1.Kochi Institute for Core Sample Research, JAMSTEC, 2.Research Institute for Marine Geodynamics, JAMSTEC, 3.Earth and Planetary Systems Science Program, Hiroshima Unviersity, 4.Ocean Resource Research Center for Next Generation, Chiba Institute of Techonology, 5.Center for Northeast Asian Studies, Tohoku University)