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Kensaku KAWABE
Ootagawa river office, Ministry of Land, Infrastructure, Transport and Tourism Chugoku Regional Development Bureau
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Shozo SAKAMOTO
Ootagawa river office, Ministry of Land, Infrastructure, Transport and Tourism Chugoku Regional Development Bureau
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Taro UCHIDA
National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism
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Rikio ITOU
Pacific Consultants CO., Ltd.