# Changes to Japanese law on 1 October 2027

This is the Markdown twin of https://japanlaw.org/en/changes/2027-10-01. 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 1 October 2027 in 9 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 National Pension Act, etc., and Other Matters, to Strengthen the Functions of the Pension System in Light of Socioeconomic Changes (Act No. 74 of 2025) (社会経済の変化を踏まえた年金制度の機能強化のための国民年金法等の一部を改正する等の法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000074 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000074)
    What changes: https://japanlaw.org/en/health-insurance-act/amendments/20271001_507AC0000000074; the law as amended, in Markdown: https://japanlaw.org/md/en/health-insurance-act/amendments/20271001_507AC0000000074/text
- 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)
    What changes: https://japanlaw.org/en/medical-care-act/amendments/20271001_507AC0000000087; the law as amended, in Markdown: https://japanlaw.org/md/en/medical-care-act/amendments/20271001_507AC0000000087/text
- Employees' Pension Insurance Act (厚生年金保険法) — https://japanlaw.org/en/employees-pension-insurance-act
  - Amended by Act Partially Amending the National Pension Act, etc., and Other Matters, to Strengthen the Functions of the Pension System in Light of Socioeconomic Changes (Act No. 74 of 2025) (社会経済の変化を踏まえた年金制度の機能強化のための国民年金法等の一部を改正する等の法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000074 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000074)
    What changes: https://japanlaw.org/en/employees-pension-insurance-act/amendments/20271001_507AC0000000074; the law as amended, in Markdown: https://japanlaw.org/md/en/employees-pension-insurance-act/amendments/20271001_507AC0000000074/text
- National Pension Act (国民年金法) — https://japanlaw.org/en/national-pension-act
  - Amended by Act Partially Amending the National Pension Act, etc., and Other Matters, to Strengthen the Functions of the Pension System in Light of Socioeconomic Changes (Act No. 74 of 2025) (社会経済の変化を踏まえた年金制度の機能強化のための国民年金法等の一部を改正する等の法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000074 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000074)
    What changes: https://japanlaw.org/en/national-pension-act/amendments/20271001_507AC0000000074; the law as amended, in Markdown: https://japanlaw.org/md/en/national-pension-act/amendments/20271001_507AC0000000074/text
- Act on General Rules for National Taxes (国税通則法) — https://japanlaw.org/en/national-tax-general-rules-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/national-tax-general-rules-act/amendments/20271001_508AC0000000012; the law as amended, in Markdown: https://japanlaw.org/md/en/national-tax-general-rules-act/amendments/20271001_508AC0000000012/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/20271001_508AC0000000002; the law as amended, in Markdown: https://japanlaw.org/md/en/local-tax-act/amendments/20271001_508AC0000000002/text
- Consumption Tax Act (消費税法) — https://japanlaw.org/en/consumption-tax-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/consumption-tax-act/amendments/20271001_508AC0000000012; the law as amended, in Markdown: https://japanlaw.org/md/en/consumption-tax-act/amendments/20271001_508AC0000000012/text
- Act on Prevention of Transfer of Criminal Proceeds (犯罪による収益の移転防止に関する法律) — https://japanlaw.org/en/criminal-proceeds-act
  - Amended by Act Partially Amending the Financial Instruments and Exchange Act and the Payment Services Act (Act No. 64 of 2026) (金融商品取引法及び資金決済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/508AC0000000064 (as Markdown: https://japanlaw.org/md/en/acts/508AC0000000064)
    What changes: https://japanlaw.org/en/criminal-proceeds-act/amendments/20271001_508AC0000000064; the law as amended, in Markdown: https://japanlaw.org/md/en/criminal-proceeds-act/amendments/20271001_508AC0000000064/text
- Financial Instruments and Exchange Act (金融商品取引法) — https://japanlaw.org/en/financial-instruments-and-exchange-act
  - Amended by Act Partially Amending the Financial Instruments and Exchange Act and the Payment Services Act (Act No. 64 of 2026) (金融商品取引法及び資金決済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/508AC0000000064 (as Markdown: https://japanlaw.org/md/en/acts/508AC0000000064)
    What changes: https://japanlaw.org/en/financial-instruments-and-exchange-act/amendments/20271001_508AC0000000064; the law as amended, in Markdown: https://japanlaw.org/md/en/financial-instruments-and-exchange-act/amendments/20271001_508AC0000000064/text

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

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## Sources

- Amendments and their dates: e-Gov (Digital Agency) (9 records)
- English names of the laws: Japanese Law Translation, Ministry of Justice (8 records)
- English names of the laws: Written for this site with AI
- English titles of the amending laws: Written for this site with AI