www.mlit.go.jp/jutakukentiku/build/jutakukentiku_house_tk4_000005.html

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建築：エネルギーの使用の合理化等に関する法律（住宅・建築物関係）のページ - 国土交通省

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https://www.mlit.go.jp/jutakukentiku/build/jutakukentiku_house_tk4_000005.html

About this page

This page from the Ministry of Land, Infrastructure, Transport and Tourism presents information on the Energy Conservation Law regarding housing and buildings. It includes details about the 2013 standard revisions, explanatory meetings on the 2019 amended Building Energy Conservation Law, and information on energy-saving measure notification targets. The page explains improvements to primary energy consumption calculation methods and modifications to non-residential building envelope standards. It provides relevant legislation, ordinances, and notification forms for compliance with these energy conservation requirements.