9:00 AM - 9:15 AM
*Shohei Kozuka1, Yuichi Onda2, Hiroaki Kato2, Yoshifumi Wakiyama3, Naoki Sakai4 (1.College of geoscience, School of Life and Environmental Sciences, University of Tsukuba, 2.Center for Research on Isotopes and Environmental Dynamics, University of Tsukuba, 3.Institute of Environmental Radioactivity, Fukushima University, 4.National Research Institute for Earth Science and Disaster Resilience)