About NAKAMURA KIMIHITO
About HIGASHI HIDETAKA
About HIROSE YOSHIKAZU
About 鴨川流域土地改良区
About NAKAJIMA YOSHITSUGU
About キタイ設計
About HAMA TAKEHIDE
About paddy field
About irrigation
About lowland
About water consumption
About drainage discharge
About farm land consolidation
About water management
About labor saving
About water saving
About low-lying area
About flow rate
About modification
About 田越し灌漑
About 農地利用集積
About 用水量
About Agricultural engineering
About 低平地
About 水田地域
About 田
About 灌漑
About 排水量