www.mlit.go.jp/river/basic_info/jigyo_keikaku/gaiyou/seibi/index.html
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河川整備基本方針・河川整備計画の策定状況 - 国土交通省水管理・国土保全局
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https://www.mlit.go.jp/river/basic_info/jigyo_keikaku/gaiyou/seibi/index.html
About this page
This page presents the status of river basin development basic policies for first-class river systems as of March 19, 2025, by the Ministry of Land, Infrastructure, Transport and Tourism. It lists 66 river systems from the Teshio River to the Shingu River, showing their establishment dates and revision histories. Users can click on each river system name to view detailed policy contents. Most systems were established or revised between 1999 and 2026, demonstrating Japan's systematic approach to river development planning and management.
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