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*Shoichi Saito
Yamagata Prefectual Forest Research and Instruction Center
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Masahide Kobayashi
Kyoto Prefectual Forest Research Center
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Tadakazu Nakajima
Forest and Forest Products Research Institute
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Haruo Kinuura
Kansai Research Center Forest and Forest Products Research Institute
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Kouichi Nunokawa
Niigata Prefectual Forest Researchi Center