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Kazuto KAWAKAMI
Forestry and Forest Products Research Institute
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Masaki EDA
Hokkaido University Museum, Hokkaido University
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Hiroe IZUMI
Hokkaido University Museum, Hokkaido University
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Kazuo HORIKOSHI
Institute of Boninology, Nishimachi, Chichijima, Ogasawara
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Hajime SUZUKI
Institute of Boninology, Nishimachi, Chichijima, Ogasawara