*Keiko Sato^1,2,3, Hidenori Kumagai², Takehiro Hirose⁴ (1.National Institute of Technology, Fukushima College, 2.JAMSTEC, Yokosuka , 3.Okayama, Univ. of Science, 4.JAMSTEC, Kochi)

*Tomita Makiko¹, Shin Toyoda¹, Jun-ichiro Ishibashi² (1.Okayama university of science, 2.Kyushu University)

*Mitsuhiro Nagata¹, Shoma Fukuda¹, Shigeru Sueoka¹, Tatsunori Yokoyama¹, Saya Kagami¹, Sota Niki², Hideki Iwano³, Tohru Danhara³, Yasuhiro Ogita¹, Yuya Kajita⁴, Saki Minami⁴, Koh Kubomi⁵, Shigeru Otoh⁶, Takafumi Hirata², Takahiro Tagami⁴ (1.Geoscientific Research Department, Tono Geoscience Center, Sector of Nuclear Fuel, Decommissioning and Waste Management Technology Development, Japan Atomic Energy Agency, 2.Geochemical Research Center, The University of Tokyo, 3.Kyoto Fission-Track Co., Ltd., 4.Division of Earth and Planetary Sciences, Graduate School of Sciences, Kyoto University, 5.Graduate School of Science and Engineering for Education, University of Toyama, 6.Academic Assembly, Faculty of Sustainable Design, University of Toyama)

*Yuta Ikebata¹, Shoichi Kiyokawa², Yukiyasu Tsutsumi³, Kenji Horie⁴, Mami Takehara⁴ (1.Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University, 2.Department of Earth and Planetary Sciences, Faculty of sciences, Kyushu University, 3.National Museum of Nature and science, 4.National Institute of Polar Research)

*Xiangyu Chen¹, Kentaro Chikamatsu², Mitsuhiro Nagata³, Tatsunori Yokoyama³, Saya Kagami³, Koshi Yamamoto⁴, Shigeru Otoh⁵ (1.Graduate School of Science and Engineering, University of Toyama, 2.Faculty of Science, University of Toyama, 3.Tono Geoscience Center, Japan Atomic Energy Agency, 4.Graduate School of Environmental Studies, Nagoya University, 5.Faculty of Sustainable Design, University of Toyama)