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This page outlines Japan's river management classification system administered by the Ministry of Land, Infrastructure, Transport and Tourism. Rivers are categorized into four types: Class-1 rivers managed by the national government or prefectures, Class-2 rivers managed by prefectures, quasi-public rivers managed by municipalities, and ordinary rivers managed by municipalities. The page provides detailed information about Class-1 rivers under national management, including water system names, river names, managed sections, and contact information for relevant river management offices throughout Japan.

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This page explains Japan's river management classification system. Rivers are categorized into four types: Class I rivers, Class II rivers, Quasi-designated rivers, and Ordinary rivers. Class I rivers are managed by the Ministry of Land, Infrastructure, Transport and Tourism or prefectures (some by ordinance-designated cities); Class II rivers by prefectures; and both Quasi-designated and Ordinary rivers are managed by municipalities. The page provides detailed information about Class I rivers managed by the national government, including specific water system names, river names, managed sections, and contact information for regional offices.