*Mitsuhiro Nagata¹, Ouhiko Miyawaki¹, Tatsuo Kanamaru¹, Sota Niki², Takafumi Hirata³, Shinji Takeuchi¹ (1.Department of Earth and Environmental Sciences, College of Humanities and Sciences, Nihon University, 2.Division for Chronological Research, Institute for Space-Earth Environmental Research, Nagoya University, 3.Geochemical Research Center, The University of Tokyo)

*Keita Takahashi¹, Mutsuki Aoya², Mayuko Fukuyama³, Takafumi Hirata¹, Tairiku Kawashima¹, Simon Richard Wallis¹ (1.The University of Tokyo, 2.Tokushima University, 3.Akita University)

*Shigeru Sueoka¹, Hideki Iwano^2,3, Tohru Danhara², Takafumi Hirata³, Melanie Kranz-Bartz^4,5, Georgina E. King⁵, Takahiro Tagami⁶ (1.Tono Geoscience Center, Japan Atomic Energy Agency, 2.Kyoto Fission-Track Co., Ltd., 3.Geochemical Research Center, Graduate School of Science, The University of Tokyo, 4.Institute of Geology, Mineralogy, and Geophysics, Ruhr-University Bochum, 5.Institute of Earth Surface Dynamics, University of Lausanne, 6.Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University)

*Daiki Terauchi¹, Kengo Ito², Junichiro Ohta¹, Kazuhide Mimura³, Kentaro Nakamura^1,4, Kazutaka Yasukawa¹, Takafumi Hirata², Yasuhiro Kato^1,4 (1.School of Engineering, Univ. Tokyo, 2.Geochemical Research Center, Univ. Tokyo, 3.National Institute of Advanced Industrial Science and Technology, 4.ORCeNG, Chiba Institute of Technology)

*Ryosuke Sakai¹, Mizuho Koike¹, Ito Kengo², Ben G Rider-Stokes³, Takafumi Hirata² (1.Hiroshima University, 2.Geochemical Research Center, The University of Tokyo, 3.The Open University)

*Shumpei Kudo¹, Sota Niki², Tetsuo Kawakami¹, Takafumi Hirata³, Takeshi Imayama⁴ (1.Kyoto University, 2.Nagoya University, 3.The University of Tokyo, 4.Okayama University of Science)

*Hisashi Asanuma¹, Hideki Iwano², Takafumi Hirata², Yusuke Sawaki² (1.Kyoto University, 2.The University of Tokyo)

*Ito Kengo¹, Sota Niki², Takafumi Hirata¹ (1.The Univ. of Tokyo, School of science, GcRC, 2.Nagoya University, ISEE)

*Sota Niki¹, Takafumi Hirata² (1.Division for Chronological Research, Institute for Space-Earth Environmental Research, Nagoya University, 2.Geochemical Research Center, The University of Tokyo)

*Hikaru Sawada^1,6, Ryosuke Oyanagi^2,6, Mitsuhiro Nagata³, Sota Niki⁴, Takafumi Hirata⁵ (1.University of Toyama, 2.Kokushikan University, 3.Nihon University, 4.Nagoya University, 5.The University of Tokyo, 6.JAMSTEC)

*Hironao Shinjoe¹, Hideki Iwano², Takafumi Hirata² (1.Center for General Education , Tokyo Keizai University, 2.Geochemical Research Center, The University of Tokyo)

*Hideki Iwano¹, Sota Niki², Hisashi Asanuma³, Shuhei Sakata⁴, Yuji Orihashi⁵, Takafumi Hirata¹ (1.Geochemical Research Center, The University of Tokyo, 2.Nagoya University, 3.Kyoto University, 4.Eathquake Research Institute, The University of Tokyo, 5.Hirosaki University)

*Satoshi Yoshida^1,2, Hisashi Asanuma³, Tomohiko Sato⁴, Takafumi Hirata⁵, Yusuke Sawaki² (1.Center for Northeast Asian Studies, Tohoku University, 2.Department of Earth Science and Astronomy, The University of Tokyo, 3.Graduate School of Human and Environmental Studies, Kyoto University, 4. Center for Fundamental Education, Okayama University of Science, 5.Geochemical Research Center, The University of Tokyo)