*Yuya Kajita¹, Shigeru Sueoka², Shoma Fukuda¹, Noriko Hasebe³, Akihiro Tamura⁴, Tomoaki Morishita⁴, Barry P. Kohn⁵, Takahiro Tagami¹ (1.Graduate School of Science, Kyoto University, 2.Japan Atomic Energy Agency, 3.Institute of Nature and Environmental Technology, Kanazawa University, 4.Department of Sciences, Kanazawa University, 5.School of Earth Sciences, University of Melbourne)