HARADA, Mariko, Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 5-1-5, Kashiwanoha,Kashiwa, Chiba, 277-8561, Japan, harada@astrobio.k.u-tokyo.ac.jp, TAJIKA, Eiichi, Department of Complexity Science and Engineering, Graduate School of Frontier Sciences, University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan, SEKINE, Yasuhito, Complexity Science and Engineering, Univ. of Tokyo, 7-3-1, Hongo,Bunkyo-ku, Tokyo, 113-0033, Japan, and OZAKI, Kazumi, University of Tokyo, Atmosphere and Ocean Research Institute, 5-1-5, Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan