*Matsushita Koki¹, Yasunori Igarashi², Yuichi Onda¹, Yoshifumi Wakiyama², Alexei Konoplev², Gennady Laptev³, Sergii Obrizan⁴, Volodymyr Demianovych⁴, Mark Zheleznyak² (1.Tsukuba University, 2.Institute of Environmental Radioactivity at Fukushima University, 3.Ukrainian Hydrometeorological Institute, 4.Chernobyl Ecocentre, State Agency of Ukraine on Exclusion Zone Management)

*Yoshifumi Wakiyama¹, Alexei Konoplev¹, Valentin Golosov², Maxim Ivanov², Mikhail Komissarov³ (1.Institute of Environmental Radioacitivity, Fukushima Universiy, 2.Faculty of Geography, M.V. Lomonosov Moscow State University, 3.Ufa Institute of Biology UFRC, Russian Academy of Science)