*Koichi Sakakibara¹, Sho Iwagami², Maki Tsujimura³, Yutaka Abe⁴, Manami Hada⁵, Ishwar Pun⁶, Yuichi Onda^3,7 (1.Faculty of Science, Shinshu University, 2.Department of Disaster Prevention, Meteorology and Hydrology, Forestry and Forest Products Research Institute, 3.Faculty of Life and Environmental Sciences, University of Tsukuba, 4.Natural Environment Conservation Center, Kanagawa, 5.Graduate School of Life and Environmental Sciences, University of Tsukuba, 6.Organization for the Strategic Coordination of Research and Intellectual Property, Meiji University, 7.Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba)

*Zul Hilmi Saidin¹, Yuichi Onda², Hiroaki Kato², Momo Kurihara², Kazuki Nanko³, Delphis F. Levia⁴ (1.Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan, 2.Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, Tsukuba, Ibaraki, Japan, 3.Department of Disaster Prevention, Meteorology and Hydrology, Forestry and Forest Products Research Institute, Tsukuba, Ibaraki, Japan, 4.Departments of Geography, University of Delaware, Newark, Delaware, USA)

*Junko Takahashi¹, Daichi Hihara¹, Takuya Sasaki¹, Yuichi Onda¹ (1.Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba)

*Yuichi Onda¹, Yuki Yamanaka¹, Yoshifumi Wakiyama², Keisuke Taniguchi³, Takaaki Kubo¹ (1.Center for Research on Isotopes and Environmental Dynamics, University of Tsukuba, 2.Institute of Environmental Radioactivity, Fukushima University, 3.Fukushima Prefectural Centre for Environmental Creation)

*Tomoki Shinozuka¹, Hiroaki Kato², Satoru Akaiwa¹, Yuichi Onda² (1.College of Geoscience, School of Life and Environmental Sciences, University of Tsukuba, 2.Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba)

*Satoru Akaiwa¹, Hiroaki Kato², Tomoki Shinozuka¹, Yuichi Onda² (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)

*Hiroaki Kato¹, Yuichi Onda¹, Zul Hilmi Saidin¹, Momo Kurihara¹, Tomoki Shinozuka², Satoru Akaiwa² (1.Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, 2.College of Geoscience, School of Life and Environmental Sciences, University of Tsukuba)

*Daisuke Tsumune¹, Tsubono Takaki¹, Kazuhiro Misumi¹, Yutaka Tateda¹, Yuichi Onda², Michio Aoyama³ (1.Central Research Institute of Electric Power Industry, 2.Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, 3.Institute of Environmental Radioactivity, Fukushima University)