# Changes to Japanese law on 12 December 2025

This is the Markdown twin of https://japanlaw.org/en/changes/2025-12-12. 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 12 December 2025 in 8 laws on this site: for each, the Act that amends it.

- Long-Term Care Insurance Act (介護保険法) — https://japanlaw.org/en/long-term-care-insurance-act
  - Amended by Act Partially Amending the Medical Care Act, etc. (Act No. 87 of 2025) (医療法等の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000087 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000087)
    Listed with the law's amendments: https://japanlaw.org/en/long-term-care-insurance-act/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/409AC0000000123/20251212_507AC0000000087
- 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 Medical Care Act, etc. (Act No. 87 of 2025) (医療法等の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000087 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000087)
    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/342AC0000000081/20251212_507AC0000000087
- Health Insurance Act (健康保険法) — https://japanlaw.org/en/health-insurance-act
  - Amended by Act Partially Amending the Medical Care Act, etc. (Act No. 87 of 2025) (医療法等の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000087 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000087)
    Listed with the law's amendments: https://japanlaw.org/en/health-insurance-act/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/211AC0000000070/20251212_507AC0000000087
- Medical Care Act (医療法) — https://japanlaw.org/en/medical-care-act
  - Amended by Act Partially Amending the Medical Care Act, etc. (Act No. 87 of 2025) (医療法等の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000087 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000087)
    Listed with the law's amendments: https://japanlaw.org/en/medical-care-act/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/323AC0000000205/20251212_507AC0000000087
- National Health Insurance Act (国民健康保険法) — https://japanlaw.org/en/national-health-insurance-act
  - Amended by Act Partially Amending the Medical Care Act, etc. (Act No. 87 of 2025) (医療法等の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000087 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000087)
    Listed with the law's amendments: https://japanlaw.org/en/national-health-insurance-act/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/333AC0000000192/20251212_507AC0000000087
- Local Tax Act (地方税法) — https://japanlaw.org/en/local-tax-act
  - Amended by Act Partially Amending the Medical Care Act, etc. (Act No. 87 of 2025) (医療法等の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000087 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000087)
    Listed with the law's amendments: https://japanlaw.org/en/local-tax-act/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/325AC0000000226/20251212_507AC0000000087
- 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 Medical Care Act, etc. (Act No. 87 of 2025) (医療法等の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000087 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000087)
    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/425AC0000000027/20251212_507AC0000000087
- Act on Assurance of Medical Care for Elderly People (高齢者の医療の確保に関する法律) — https://japanlaw.org/en/elderly-medical-care-act
  - Amended by Act Partially Amending the Medical Care Act, etc. (Act No. 87 of 2025) (医療法等の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000087 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000087)
    Listed with the law's amendments: https://japanlaw.org/en/elderly-medical-care-act/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/357AC0000000080/20251212_507AC0000000087

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

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## Sources

- Amendments and their dates: e-Gov (Digital Agency) (8 records)
- English names of the laws: Japanese Law Translation, Ministry of Justice (8 records)
- English titles of the amending laws: Written for this site with AI