*Takuma Shiohara¹, Tetsuji Onoue² (1.Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University, 2.Department of Earth and Planetary Sciences, Kyushu University)

*Issei Murakami¹, Azumi Kuroyanagi¹, Reishi Takashima¹, Hiroshi Nishi² (1.Tohoku University, 2.Fukui Prefectural University)

*Atsushi Matsuoka¹ (1.Department of Geology, Faculty of Science, Niigata University)

*Hisao Ando¹ (1.Department of Earth Sciences, College of Science, Ibaraki University)

*Takumi Otsubo¹, Reishi Takashima², Azumi Kuroyanagi², Toshiro Yamanaka³, Yuji Orihashi⁴, Yoshihiro Asahara⁵ (1.Tohoku University, 2.The Tohoku University Museum, 3.Tokyo University of Marine Science and Technology, 4.Hirosaki University, 5.Nagoya University)

*Shania James¹ (1.University of Kerala)

*Junichiro Kuroda^1,5, Kyoko Hagino², Yoichi Usui³, Paul R Bown⁴, Kan-Hsi Hsiung⁵, Saburo Sakai⁵, Masafumi MURAYAMA², Takuto Ando⁶ (1.Department of Ocean Floor Geoscience, Atmosphere and Ocean Research Institute, the University of Tokyo, 2.Center for Advanced Marine Core Research, Kochi University, 3.Kanazawa University, 4.University College London, 5.Japan Agency for Marine-Earth Science and Technology, 6.Akita University)

*Hiroyuki Hoshi¹, Ryoki Takahashi¹, Reishi Takashima², Keiichi Hayashi³ (1.Aichi University of Education, 2.Tohoku University, 3.Hokkaido Research Organization)

*Hiroyuki Hoshi¹, Yota Kitano¹, Ichiha Mita¹, Reishi Takashima², Keiichi Hayashi³ (1.Aichi University of Education, 2.Tohoku University, 3.Hokkaido Research Organization)

*Hiroki Matsui¹ (1.Graduate School of International Resource Sciences, Akita University)

*Akihiro Tanimoto¹, Makoto Okada¹ (1.Ibaraki University)

*Takeshi Hasegawa¹, Chie Kusu¹, Makoto Okada¹, Aoi Hiratsuka¹, Kuniaki Nishiki², Yuki Sato² (1.College of Science, Ibaraki University, 2.Nuclear Regulation Authority)