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Noriyuki MINAMI
Nara Prefecture, Civil Engineering Department
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Wataru SAKURAI
Incorporated Administrative Agency, Public Works Research Institute
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Takashi YAMADA
Hokkaido University, Graduate School of Agriculture
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Toshirou TOKUNAGA
Development Construction Department, Okinawa General Bureau
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Mineto TOMISAKA
Okinawa Branch Office, Nippon Koei Co., Ltd.