www.mlit.go.jp/mizukokudo/watersupply/mizukokudo_watersupply_tk_000001_00098.html

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上下水道：「水道事業における分散型システムの導入手引き」について - 国土交通省

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https://www.mlit.go.jp/mizukokudo/watersupply/mizukokudo_watersupply_tk_000001_00098.html

About this page

This page announces the Ministry of Land, Infrastructure, Transport and Tourism's publication of the "Guidelines for Introducing Distributed Water Supply Systems in Water Service Operations." Amid challenges like population decline and intensifying natural disasters, achieving resilient and sustainable water services requires optimal facility placement through a best-mix approach combining centralized and distributed systems. A review committee established in January 2026 developed practical guidelines for water utilities considering distributed system implementation. The guidelines document, including an overview and full version, has been made publicly available for reference by water service operators.