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*Norio Sahashi
Kyushu Research Center, Forestry and Forest Products Research Institute
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Mitsuteru Akiba
Kyushu Research Center, Forestry and Forest Products Research Institute
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Makoto Ishihara
Kyushu Research Center, Forestry and Forest Products Research Institute
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Shigeru Morita
Kagoshima Prefecture Forest Experimental Station
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Yasuhisa Abe
Kyushu Research Center, Forestry and Forest Products Research Institute