*Kitayama Kyo¹, Yu Morino¹, Masayuki Takigawa², Teruyuki Nakajima³, Hiroshi Hayami⁴, Haruyasu Nagai¹, Hiroaki Terada⁵, Kazuo Saito⁶, Toshiki Shimbori⁶, Mizuo Kajino⁶, Sekiyama Tsuyoshi⁶, Damien Didier⁷, Anne Mathieu⁷, Toshimasa Ohara¹, Haruo Tsuruta^8,9, Yasuji Oura¹⁰, Mitsuru Ebihara¹⁰, Tokushi Shibata¹¹ (1.National Institute for Environmental Studies, 2.Japan Agency for Marine-Earth Science and Technology, 3.Japan Aerospace Exploration Agency, 4.Central Research Institute of Electric Power Industry, 5.Japan Atomic Energy Agency, 6.Meteorological Research Institute, 7.Institut de Radioprotection et de Sûreté Nucléaire, 8.Remote Sensing Technology Center of Japan, 9.University of Tokyo, 10.Tokyo Metropolitan University, 11.Japan Radioisotope Association)