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*Yoshinori Iizuka
Institute of Low temperature Science, Hokkaido University
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Yu Hoshina
Nagoya University
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Ryu Uemura
University of Ryukyu
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Hiroshi Ohno
Kitami Institute of Technology
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Motohiro Hirabayashi
National Institute of Polar Research
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Kotaro Fukui
Tateyama Caldera Sabo Museum
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Toshitaka Suzuki
Graduate School of Science and Engineering, Yamagata University
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Hedeaki Motoyama
National Institute of Polar Research