4:15 PM - 5:30 PM
*Shigeru SUEOKA1, Ken-ichi YASUE1, Masakazu NIWA1, Koji SHIMADA1, Tsuneari ISHIMARU1, Koji UMEDA1, Ryuji YAMADA2, Tohru DANHARA3, Hideki IWANO3, Chitaro GOUZU4 (1.Japan Atomic Energy Agency, 2.National Research Institute for Earth Science and Disaster Prevention, 3.Kyoto Fission-Track Co., Ltd., 4.Hiruzen Institute for Geology and Chronology Co., Ltd.)