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Yasuhiro Takashimizu
Mathematical and Natural Sciences Course, Faculty of Education, Institute of Humanities, Social Sciences and Education, Niigata University
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Kazuhisa Goto
International Research Institute of Disaster Science, Tohoku University
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Daisuke Sugawara
Museum of Natural and Environmental History
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Osamu Fujiwara
Geological Survey of Japan, AIST
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Gentaro Kawakami
Geological Survey of Hokkaido, Hokkaido Research Organization