# Changes to Japanese law on 27 May 2026

This is the Markdown twin of https://japanlaw.org/en/changes/2026-05-27. 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.

What changed on 27 May 2026 in 2 laws on this site: for each, the Act that amends it.

- Residential Basic Book Act (住民基本台帳法) — https://japanlaw.org/en/residential-basic-book-act
  - Amended by Act Partially Amending the Telecommunications Business Act and the Act on Nippon Telegraph and Telephone Corporation, etc. (Act No. 46 of 2025) (電気通信事業法及び日本電信電話株式会社等に関する法律の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000046 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000046)
    Listed with the law's amendments: https://japanlaw.org/en/residential-basic-book-act/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/342AC0000000081/20260527_507AC0000000046
- Act on the Use of Numbers to Identify a Specific Individual in Administrative Procedures (行政手続における特定の個人を識別するための番号の利用等に関する法律) — https://japanlaw.org/en/my-number-act
  - Amended by Act Partially Amending the Telecommunications Business Act and the Act on Nippon Telegraph and Telephone Corporation, etc. (Act No. 46 of 2025) (電気通信事業法及び日本電信電話株式会社等に関する法律の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000046 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000046)
    Listed with the law's amendments: https://japanlaw.org/en/my-number-act/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/425AC0000000027/20260527_507AC0000000046

Every day: https://japanlaw.org/en/changes

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## Sources

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