*Kaoru Kubota¹, Ryo Nakano², Masafumi MURAYAMA², Tsuyoshi Ishikawa¹, Yusuke Yokoyama³, Atsushi Suzuki⁴ (1.Kochi Institute for Core Sample Research, JAMSTEC, 2.Faculty of Agriculture and Marine Science, Graduate School of Integrated Arts and Sciences, Kochi University, 3.Atmosphere and Ocean Research Institute, The University of Tokyo, 4.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology)

Yuki Yokoyama¹, *Tetsuro Hirono¹, Hiroshi Ogasawara², Tsuyoshi Ishikawa³ (1.Department of Earth and Space Science, Graduate School of Science, Osaka University, 2.Ritsumeikan University, 3.Kochi Institute for Core Sample Research, JAMSTEC)

*Jiwon Eom¹, Shigeyuki Wakaki², Norikatsu Akizawa¹, Tsuyoshi Ishikawa², Kyoko Yamaoka³, Eiichi TAKAZAWA⁴, Hodaka Kawahata¹ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Kochi Institute for Core Sample Research, JAMSTEC, 3.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 4.Department of Geology, Faculty of Science, Niigata University)

*Tsuyoshi Ishikawa¹, Asuka Yamaguchi² (1.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, 2.Atmosphere and Ocean Research Institute, the University of Tokyo)

*Yuka Tatera¹, Katsuyuki Yamashita¹, Tsuyoshi Ishikawa², Mayuri Inoue¹ (1.Okayama University, 2.Kochi Institute for Core Sample Research, JAMSTEC)

*Andros Daniel Cruz Salmeron¹, Hideko Takayanagi¹, Shigeyuki Wakaki², Hitomi Uchimura Wakaki³, Takuya Itaki⁴, Tsuyoshi Ishikawa², Yasufumi Iryu¹ (1.Tohoku University, 2.JAMSTEC, 3.Kochi University, 4.AIST)

*Adam David Sproson^1,2, Toshihiro Yoshimura², Takahiro Aze¹, Yusuke Yokoyama^1,2, Naohiko Ohkouchi², Tsuyoshi Ishikawa³, Shigeyuki Wakaki³ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Department of Biogeochemistry, Japan Agency for Marine-Earth Science and Technology, 3.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology)