# Act No. 66 of 2026: Act Partially Amending the Imperial House Act, etc.

This is the Markdown twin of https://japanlaw.org/en/acts/508AC0000000066. Every law, and how to address a provision: https://japanlaw.org/llms.txt. The same laws as MCP tools (no sign-in): https://japanlaw.org/mcp.

Every law on japanlaw.org that Act No. 66 of 2026 amends, and when each change takes effect; promulgated 24 July 2026.

- Number: 令和八年法律第六十六号 (令和8年法律第66号), Act No. 66 of 2026
- Title: Act Partially Amending the Imperial House Act, etc. (皇室典範等の一部を改正する法律)
- Promulgated: 24 July 2026
- In Japanese: https://japanlaw.org/ja/acts/508AC0000000066
- Changes to Japanese law, by date: https://japanlaw.org/en/changes (as Markdown: https://japanlaw.org/md/en/changes)

## Administrative Procedure Act (行政手続法)

https://japanlaw.org/en/administrative-procedure-act

- 24 July 2026: In force. The law in force: https://japanlaw.org/en/administrative-procedure-act; in Markdown: https://japanlaw.org/md/en/administrative-procedure-act

## Residential Basic Book Act (住民基本台帳法)

https://japanlaw.org/en/residential-basic-book-act

- 24 July 2026: Since replaced.
- 24 October 2026: In force. 2 provisions changed · 1 provision added · 2 provisions in the supplementary provisions. What it changes: https://japanlaw.org/en/residential-basic-book-act/amendments/20261024_508AC0000000066; the law as amended, in Markdown: https://japanlaw.org/md/en/residential-basic-book-act/amendments/20261024_508AC0000000066/text

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## Sources

- The dates and the amending law: e-Gov (Digital Agency) (2 records)
- English title of the amending law: Written for this site with AI
- English names of the laws: Japanese Law Translation, Ministry of Justice (2 records)