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*Hiroyuki Tado
Yamaguchi Prefectural Forestry Guidance Institute
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Hiroyuki Sugimoto
Yamaguchi Prefectural Forestry Guidance Institute
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Yasumitsu Kuwano
Yamaguchi Prefectural Forestry Guidance Institute
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Hiroshi Kondou
Forestry and Forest Products Research Institute Kansai Research Center
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Eiji Hosoi
Yamaguchi University Faculty of agriculture