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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Cabinet Approves Promulgation of Revised Imperial House Law Allowing Adoptions from Former Imperial Branch Families to Maintain the Imperial Family
July 21. 2026
At a Cabinet meeting on July 21, the Japanese government approved the promulgation of the revised Imperial House Law, aimed at ensuring a stable number of members of the Imperial Family. The revision is expected to be officially promulgated soon through publication in the Official Gazette. It is built around two key measures: allowing female members of the Imperial Family to remain in the Imperial Household after marriage, and permitting the adoption of patrilineal male descendants of former imperial branch families into the Imperial Family. [...]
Source: Nikkei Shimbun
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