*Motoki Sumi¹, Shin-ichi Takehiro², Wataru Ohfuchi³, Hideko Nomura⁴, Yuka Fujii⁵ (1.Department of Earth & Planetary Sciences, Tokyo Institute of Technology, 2.Research Institute for Mathematical Sciences, Kyoto University, 3.Department of Planetology/CPS, Graduate School of Science, Kobe University, 4.Division of Science, National Astronomical Observatory of Japan, 5.Earth-Life Science Institute, Tokyo Institute of Technology)