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Shigeyuki Suzuki
Faculty of Science, Okayama University
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Takashi Matsubara
Museum of Nature and Human Activities, Hyogo
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Hirohisa Matsuura
Institute of Geology and Geoinformation, Geological Survey of Japan, AIST
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Tohru Danhara
Kyoto Fission-Track Co, Ltd.
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Hideki Iwano
Kyoto Fission-Track Co, Ltd.