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Ryoichi OHNO
Japan Conservation Engineers & Co., Ltd.
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Shin-ichi YAMASHINA
Japan Conservation Engineers & Co., Ltd.
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Takanari YAMASAKI
Japan Conservation Engineers & Co., Ltd.
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Tomofumi KOYAMA
Kyoto University, School of Urban and Environmental Engineering
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Fumitoshi ESAKA
Forestry Agency, Tohoku Regional Forest Office
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Shikoh KASAI
Forestry Agency, Tohoku Regional Forest Office