www.mlit.go.jp/jutakukentiku/build/jutakukentiku_house_tk4_000302.html

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建築：建築物のライフサイクルカーボンの算定・評価等を促進する制度に関する検討会 - 国土交通省

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https://www.mlit.go.jp/jutakukentiku/build/jutakukentiku_house_tk4_000302.html

About this page

This page describes a deliberation council established to promote systems for calculating and evaluating lifecycle carbon emissions of buildings in Japan. As Japan targets carbon neutrality by 2050, the construction sector—accounting for approximately 40% of national CO2 emissions—requires enhanced reduction efforts beyond energy efficiency. The council aims to implement a building Lifecycle Carbon Assessment (LCA) system by fiscal 2028 to calculate environmental impacts from planning to demolition and encourage behavioral change toward emissions reduction. The page presents the council's establishment rationale, interim summary (published January 28, 2026), and details from the first two meetings with relevant materials.