*Akane Hosoda¹, Ryuji Asami², Shusaku Sugimoto³, Hideko Takayanagi², Ryuichi Shinjo^4,5, Toru Nakamori², Yasufumi Iryu² (1.Faculty of Science, Tohoku University, 2.Institute of Geology and Paleontology, Graduate School of Science, Tohoku University, 3.Department of Geophysics, Graduate School of Science, Tohoku University, 4.Research Institute for Humanity and Nature, 5.Department of Physics and Earth Science, Faculty of Science, University of Ryukyus )

*Ryuji Asami¹, Rikuto Hondo², Ryu Uemura³, Masaki Fujita⁴, Shinji Yamasaki⁵, Chuan-Chou Shen^6,7, Chung-Che Wu^6,8, Xiuyang Jiang⁹, Hideko Takayanagi¹, Ryuichi Shinjo^10,11, Akihiro Kano¹², Yasufumi Iryu¹ (1.Graduate School of Science, Tohoku University, 2.Faculty of Science, Tohoku University, 3.Graduate School of Environmental Studies, Nagoya University, 4.Department of Anthropology, National Museum of Nature and Science, 5.Okinawa Prefectural Museum & Art Museum, 6.Department of Geosciences, National Taiwan University, 7.Research Center for Future Earth, National Taiwan University, 8.Department of Chemistry and Applied Biosciences, ETH Zurich, 9.College of Geography Science, Fujian Normal University, 10.Research Institute for Humanity and Nature (RIHN), 11.Faculty of Science, University of the Ryukyus, 12.School of Science, the University of Tokyo)