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Shoichi Saito
Yamagata Prefectural Forest Research and Instruction Center
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Akihiko Nagaki
Institute of Forestry, Akita Prefectural Agriculture, Forestry and Fisheries Research Centr
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Kyouhei Nitta
Akita Prefectural Ogachi Local Office
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Katsutoshi Kasuga
Akita Prefectural Hiraga Local Office
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Nobuyuki Ogasawara
Forestry Management Division, Agriculture, Forestry and Fisheries Department, Akita Prefectural Government