# Changes to Japanese law on 20 May 2027

This is the Markdown twin of https://japanlaw.org/en/changes/2027-05-20. 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 changes on 20 May 2027 in 4 laws on this site: for each, the Act that amends it and the wording before and after, in Japanese and English.

- Health Insurance Act (健康保険法) — https://japanlaw.org/en/health-insurance-act
  - Amended by Act Partially Amending the Act on Securing Quality, Efficacy and Safety of Products Including Pharmaceuticals and Medical Devices, etc. (Act No. 37 of 2025) (医薬品、医療機器等の品質、有効性及び安全性の確保等に関する法律等の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000037 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000037)
    What changes: https://japanlaw.org/en/health-insurance-act/amendments/20270520_507AC0000000037; the law as amended, in Markdown: https://japanlaw.org/md/en/health-insurance-act/amendments/20270520_507AC0000000037/text
- Local Tax Act (地方税法) — https://japanlaw.org/en/local-tax-act
  - Amended by Act Partially Amending the Local Tax Act, etc. (Act No. 2 of 2026) (地方税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/508AC0000000002 (as Markdown: https://japanlaw.org/md/en/acts/508AC0000000002)
    What changes: https://japanlaw.org/en/local-tax-act/amendments/20270520_508AC0000000002; the law as amended, in Markdown: https://japanlaw.org/md/en/local-tax-act/amendments/20270520_508AC0000000002/text
- Act on Special Measures Concerning Taxation (租税特別措置法) — https://japanlaw.org/en/special-taxation-measures-act
  - Amended by Act Partially Amending the Income Tax Act, etc. (Act No. 12 of 2026) (所得税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/508AC0000000012 (as Markdown: https://japanlaw.org/md/en/acts/508AC0000000012)
    What changes: https://japanlaw.org/en/special-taxation-measures-act/amendments/20270520_508AC0000000012; the law as amended, in Markdown: https://japanlaw.org/md/en/special-taxation-measures-act/amendments/20270520_508AC0000000012/text
- 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 Act on Securing Quality, Efficacy and Safety of Products Including Pharmaceuticals and Medical Devices, etc. (Act No. 37 of 2025) (医薬品、医療機器等の品質、有効性及び安全性の確保等に関する法律等の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000037 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000037)
    What changes: https://japanlaw.org/en/elderly-medical-care-act/amendments/20270520_507AC0000000037; the law as amended, in Markdown: https://japanlaw.org/md/en/elderly-medical-care-act/amendments/20270520_507AC0000000037/text

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

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## Sources

- Amendments and their dates: e-Gov (Digital Agency) (4 records)
- English names of the laws: Japanese Law Translation, Ministry of Justice (4 records)
- English titles of the amending laws: Written for this site with AI