*Jumpei Yoshioka^1,2, Junichiro Kuroda², Kenji Matsuzaki², Sota Niki³, Takafumi Hirata³, Takeru Kochi^1,2, Nanako O. Ogawa⁴, Naohiko Ohkouchi⁴ (1.Department of Earth and Planetary Science, the University of Tokyo, 2.Atmosphere and Ocean Research Institute, the University of Tokyo, 3.Geochemical Research Center, the University of Tokyo, 4.Japan Agency for Marine-Earth Science and Technology)

*Yukio Isozaki¹, Yusuke Sawaki¹, Hideki Iwano², Takafumi Hirata³, Keitaro Kunugiza⁴ (1.Department of Earth Science and Astronomy, Graduate School of Arts and Sciences, The University of Tokyo, 2.Kyoto Fission-Track Co. Ltd. , 3.Geochemical Resaerch Center, The University of Tokyo, 4.Department of Human Development, Toyama University)

*Yoshihiro Nakamura¹, Kazuhiro Miyazaki¹, Makoto Takeuchi^2,1, Hideki Iwano³, Tohru Danhara³, Takafumi Hirata⁴ (1.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 2.Graduate School of Environmental Studies, Nagoya University, 3.Kyoto Fission-Track CO., Ltd., 4.Geochemical Research Center, The University of Tokyo)

*Yoshio Soeda¹, Saki Tsutsumi¹, Takahiro Miyauchi², Keigo Kitamura³, Jun Nishijima³, Hiroki Saito¹, Sachihiro Taguchi⁴, Tohru Danhara⁵, Hideki Iwano^5,6, Takafumi Hirata⁶ (1.West Japan Engineering Consultants,Inc., 2.Chiba University, 3.Kyushu University, 4.Fukuoka University, 5.Kyoto Fission-Track Co. Ltd, 6.The University of Tokyo)

*Sota Niki¹, Shuhei Kosugi¹, Hideki Iwano^1,2, Tohru Danhara², Takafumi Hirata¹ (1.Geochemical Research Center, School of Science, The University of Tokyo, 2.KYOTO FISSION-TRACK Co.Ltd)

*Shuhei Kosugi¹, Sota Niki¹, Takafumi Hirata¹ (1.Geochemical Research Center, The University of Tokyo)

*Kenta Yoshida¹, Sota Niki², Hikaru Sawada¹, Ryosuke Oyanagi³, Takafumi Hirata² (1.Japan Agency for Marine-Earth Science and Technology, 2.Geochemical Research Center, The University of Tokyo, 3.Kokushikan University)

*Hideki Iwano^1,2, Sota Niki², Tohru Danhara¹, Takafumi Hirata² (1.Kyoto Fission-Track Co., Ltd., 2.Geochemical Research Center The University of Tokyo)

*Hikaru Sawada¹, Ryosuke Oyanagi², Sota Niki³, Mitsuhiro Nagata⁴, Takafumi Hirata³ (1.Japan Marine Science and Technology Center, 2.Kokushikan University, 3.The University of Tokyo, 4.Toyama University)

*Ryosuke Nagao¹, Yuki ISHIHARA¹, Satoshi Yoshida², Sota Niki³, Yuta Ijichi³, Yusuke Sawaki², NATSUKO ADACHI⁶, Takeshi Ohno⁵, Yuichiro Ueno⁴, Takafumi Hirata³, Tsuyoshi Komiya^1,2 (1.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo , 2.Graduate School of Arts and Sciences, The University of Tokyo, 3.Geochemical Research Center, The University of Tokyo, 4.Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 5.Department of Chemistry, Faculty of Science, Gakushuin University, 6.Department of Geosciences, Osaka Metropolitan University)

*Satoshi Yoshida¹, Hisashi Asanuma², Tomohiko Sato³, Yusuke Sawaki¹, Takafumi Hirata⁴ (1.Graduate School of Arts and Sciences, The University of Tokyo, 2.Graduate School of Human and Environmental Studies, Kyoto University, 3.Center for Fundamental Education, Okayama University of Science, 4.Geochemical Research Center, The University of Tokyo,)