The Constitutional Revision Research Project seeks to follow, analyze, and document constitutional discussion in Japan.
Mainichi ShimbunThe Constitution of Japan (also known as the Postwar Constitution) went into effect in 1947, replacing the Meiji Constitution of 1890. It is recognized as the oldest unamended constitution in the world as of 2022, having never undergone revision in over 70 years since its promulgation. Throughout this time, constitutional revision has become an important subject of vigorous debate and discussion in Japan and around the world.*
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Japanese Court Rules That Ban on Same-Sex Marriage is Unconstitutional
May 31, 2023
On Tuesday the Nagoya District Court ruled that Japan’s ban on same-sex marriage is unconstitutional. The lawyers of the plaintiffs and supporters celebrated outside the courthouse with banners and signs saying, “unconstitutional judgement, more progress towards marriage equality,” “[ban on same-sex marriage] violates Article 14" and “[ban on same-sex marriage] violates Article 24." The lawyer for the plaintiffs, Asato Yamada, later stated that the court’s ruling made it clear that the current ban on same-sex marriage violates Article 14, and that Article 24 does not specify a prohibition on same-sex marriage.

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