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*Hiromi Yamagawa
Kyushu Research Center, Forestry and Forest Products Research Institude
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Hidetoshi Shigenaga
Kyushu Research Center, Forestry and Forest Products Research Institude
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Masatake Araki
Kyushu Research Center, Forestry and Forest Products Research Institude
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Satoshi Ito
Faculty of Agriculture, University of Miyazaki