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*Futoshi Nanayama
National Institute of Advanced Industrial Science and Technology
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Kazuaki Watanabe
National Institute of Advanced Industrial Science and Technology
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Hideki Yoshikawa
National Institute of Advanced Industrial Science and Technology
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Kiyoyuki Shigeno
Faculty of Science, Ibaraki University
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Takeshi Hasegawa
Faculty of Science, Ibaraki University
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Yasuo Ikeda
Hokkaido University of Education, Kushiro Campus
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Chihiro Sakai
Hokkaido University of Education, Kushiro Campus
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Kazuto Ishiwata
Betsukai Museum
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Yasuto Uchida
Geological Survey of Hokkaido, HRO