# Act No. 31 of 2026: Act Partially Amending the Health Insurance Act, etc.

This is the Markdown twin of https://japanlaw.org/en/acts/508AC0000000031. 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. 31 of 2026 amends, and when each change takes effect; promulgated 5 June 2026.

- Number: 令和八年法律第三十一号 (令和8年法律第31号), Act No. 31 of 2026
- Title: Act Partially Amending the Health Insurance Act, etc. (健康保険法等の一部を改正する法律)
- Promulgated: 5 June 2026
- In Japanese: https://japanlaw.org/ja/acts/508AC0000000031
- Changes to Japanese law, by date: https://japanlaw.org/en/changes (as Markdown: https://japanlaw.org/md/en/changes)

## 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

- 5 June 2026: Since replaced.
- 1 August 2026: Since replaced.
- 1 March 2027: Not yet in force. 16 provisions changed · 15 provisions added · 1 provision in the supplementary provisions. What it changes: https://japanlaw.org/en/elderly-medical-care-act/amendments/20270301_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/elderly-medical-care-act/amendments/20270301_508AC0000000031/text
- 1 April 2027: Not yet in force. 3 provisions changed · 2 provisions in the supplementary provisions. What it changes: https://japanlaw.org/en/elderly-medical-care-act/amendments/20270401_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/elderly-medical-care-act/amendments/20270401_508AC0000000031/text
- By 4 June 2028: Not yet in force. 32 provisions changed · 1 provision removed · 4 provisions in the supplementary provisions. What it changes: https://japanlaw.org/en/elderly-medical-care-act/amendments/20280604_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/elderly-medical-care-act/amendments/20280604_508AC0000000031/text
- By 4 June 2031: Not yet in force. 3 provisions changed · 14 provisions added · 2 provisions in the supplementary provisions. What it changes: https://japanlaw.org/en/elderly-medical-care-act/amendments/20310604_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/elderly-medical-care-act/amendments/20310604_508AC0000000031/text

## Health Insurance Act (健康保険法)

https://japanlaw.org/en/health-insurance-act

- 5 June 2026: Since replaced.
- 1 August 2026: Since replaced.
- 1 March 2027: Not yet in force. 23 provisions changed · 7 provisions added · 1 provision in the supplementary provisions. What it changes: https://japanlaw.org/en/health-insurance-act/amendments/20270301_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/health-insurance-act/amendments/20270301_508AC0000000031/text
- 1 April 2027: Not yet in force. 4 provisions changed · 1 provision added · 3 provisions in the supplementary provisions. What it changes: https://japanlaw.org/en/health-insurance-act/amendments/20270401_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/health-insurance-act/amendments/20270401_508AC0000000031/text
- By 4 June 2028: Not yet in force. 62 provisions changed · 127 provisions added · 1 provision removed · 10 provisions in the supplementary provisions. What it changes: https://japanlaw.org/en/health-insurance-act/amendments/20280604_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/health-insurance-act/amendments/20280604_508AC0000000031/text

## Local Tax Act (地方税法)

https://japanlaw.org/en/local-tax-act

- 5 June 2026: Since replaced.
- 1 April 2027: Not yet in force. 2 provisions changed · 2 provisions in the supplementary provisions. What it changes: https://japanlaw.org/en/local-tax-act/amendments/20270401_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/local-tax-act/amendments/20270401_508AC0000000031/text
- By 4 June 2028: Not yet in force. 3 provisions changed · 3 provisions in the supplementary provisions. What it changes: https://japanlaw.org/en/local-tax-act/amendments/20280604_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/local-tax-act/amendments/20280604_508AC0000000031/text

## Long-Term Care Insurance Act (介護保険法)

https://japanlaw.org/en/long-term-care-insurance-act

- 1 April 2027: Not yet in force. 2 provisions in the supplementary provisions. What it changes: https://japanlaw.org/en/long-term-care-insurance-act/amendments/20270401_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/long-term-care-insurance-act/amendments/20270401_508AC0000000031/text

## Medical Care Act (医療法)

https://japanlaw.org/en/medical-care-act

- 5 June 2026: Since replaced.
- 1 April 2027: Not yet in force. 8 provisions changed · 1 provision in the supplementary provisions. What it changes: https://japanlaw.org/en/medical-care-act/amendments/20270401_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/medical-care-act/amendments/20270401_508AC0000000031/text

## 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

- By 4 June 2028: Not yet in force. 1 provision changed · 3 provisions in the supplementary provisions. What it changes: https://japanlaw.org/en/my-number-act/amendments/20280604_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/my-number-act/amendments/20280604_508AC0000000031/text

## National Health Insurance Act (国民健康保険法)

https://japanlaw.org/en/national-health-insurance-act

- 5 June 2026: Since replaced.
- 1 August 2026: Since replaced.
- 1 March 2027: Not yet in force. 20 provisions changed · 12 provisions added · 1 provision in the supplementary provisions. What it changes: https://japanlaw.org/en/national-health-insurance-act/amendments/20270301_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/national-health-insurance-act/amendments/20270301_508AC0000000031/text
- 1 April 2027: Not yet in force. 9 provisions changed · 6 provisions added · 3 provisions in the supplementary provisions. What it changes: https://japanlaw.org/en/national-health-insurance-act/amendments/20270401_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/national-health-insurance-act/amendments/20270401_508AC0000000031/text
- 1 April 2028: Not yet in force. 4 provisions changed · 1 provision in the supplementary provisions. What it changes: https://japanlaw.org/en/national-health-insurance-act/amendments/20280401_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/national-health-insurance-act/amendments/20280401_508AC0000000031/text
- By 4 June 2028: Not yet in force. 34 provisions changed · 31 provisions added · 6 provisions in the supplementary provisions. What it changes: https://japanlaw.org/en/national-health-insurance-act/amendments/20280604_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/national-health-insurance-act/amendments/20280604_508AC0000000031/text

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

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

- 1 April 2027: Not yet in force. 5 provisions in the supplementary provisions. What it changes: https://japanlaw.org/en/residential-basic-book-act/amendments/20270401_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/residential-basic-book-act/amendments/20270401_508AC0000000031/text
- By 4 June 2028: Not yet in force. 3 provisions changed. What it changes: https://japanlaw.org/en/residential-basic-book-act/amendments/20280604_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/residential-basic-book-act/amendments/20280604_508AC0000000031/text
- By 4 June 2031: Not yet in force. 1 provision changed. What it changes: https://japanlaw.org/en/residential-basic-book-act/amendments/20310604_508AC0000000031; the law as amended, in Markdown: https://japanlaw.org/md/en/residential-basic-book-act/amendments/20310604_508AC0000000031/text

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## Sources

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