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*Masazumi Kayama
Hokkaido Research Center, Forestry and Forest Products Research Institute
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Sadao Sugata
Hokkaido University Forests, FSC
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Hajime Houjyo
Hokkaido University Forests, FSC
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Yukio Akibayashi
Hokkaido University Forests, FSC
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Kaichiro Sasa
Hokkaido University Forests, FSC
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Mitsutoshi Kitao
Hokkaido Research Center, Forestry and Forest Products Research Institute
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Hiroyuki Tobita
Hokkaido Research Center, Forestry and Forest Products Research Institute
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Yutaka Maruyama
Hokkaido Research Center, Forestry and Forest Products Research Institute
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Takayoshi Koike
Hokkaido University Forests, FSC