# Changes to Japanese law on 23 May 2025

This is the Markdown twin of https://japanlaw.org/en/changes/2025-05-23. 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 23 May 2025 in 10 laws on this site: for each, the Act that amends it.

- Unfair Competition Prevention Act (不正競争防止法) — https://japanlaw.org/en/unfair-competition-prevention-act
  - Amended by Act Partially Amending the Code of Criminal Procedure, etc. to Respond to Advances in Information and Communications Technology, etc. (Act No. 39 of 2025) (情報通信技術の進展等に対応するための刑事訴訟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/507AC0000000039 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000039)
    Listed with the law's amendments: https://japanlaw.org/en/unfair-competition-prevention-act/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/405AC0000000047/20250523_507AC0000000039
- 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 Act on the Use of Numbers to Identify a Specific Individual in Administrative Procedures and the Residential Basic Book Act (Act No. 38 of 2025) (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及び住民基本台帳法の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000038 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000038)
    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/342AC0000000081/20250523_507AC0000000038
- Immigration Control and Refugee Recognition Act (出入国管理及び難民認定法) — https://japanlaw.org/en/immigration-control-act
  - Amended by Act Partially Amending the Code of Criminal Procedure, etc. to Respond to Advances in Information and Communications Technology, etc. (Act No. 39 of 2025) (情報通信技術の進展等に対応するための刑事訴訟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/507AC0000000039 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000039)
    Listed with the law's amendments: https://japanlaw.org/en/immigration-control-act/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/326CO0000000319/20250523_507AC0000000039
- Penal Code (刑法) — https://japanlaw.org/en/penal-code
  - Amended by Act Partially Amending the Code of Criminal Procedure, etc. to Respond to Advances in Information and Communications Technology, etc. (Act No. 39 of 2025) (情報通信技術の進展等に対応するための刑事訴訟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/507AC0000000039 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000039)
    Listed with the law's amendments: https://japanlaw.org/en/penal-code/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/140AC0000000045/20250523_507AC0000000039
- Act on the Punishment of Acts of Photographing Sexual Poses, etc. and the Erasure, etc. of Electronic or Magnetic Records of Images of Sexual Poses Recorded on Seized Articles (性的な姿態を撮影する行為等の処罰及び押収物に記録された性的な姿態の影像に係る電磁的記録の消去等に関する法律) — https://japanlaw.org/en/sexual-image-filming-act
  - Amended by Act Partially Amending the Code of Criminal Procedure, etc. to Respond to Advances in Information and Communications Technology, etc. (Act No. 39 of 2025) (情報通信技術の進展等に対応するための刑事訴訟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/507AC0000000039 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000039)
    Listed with the law's amendments: https://japanlaw.org/en/sexual-image-filming-act/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/505AC0000000067/20250523_507AC0000000039
- Passport Act (旅券法) — https://japanlaw.org/en/passport-act
  - Amended by Act Partially Amending the Code of Criminal Procedure, etc. to Respond to Advances in Information and Communications Technology, etc. (Act No. 39 of 2025) (情報通信技術の進展等に対応するための刑事訴訟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/507AC0000000039 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000039)
    Listed with the law's amendments: https://japanlaw.org/en/passport-act/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/326AC0000000267/20250523_507AC0000000039
- Special Act on the Immigration Control of, inter alia, those who have lost Japanese Nationality pursuant to the Treaty of Peace with Japan (日本国との平和条約に基づき日本の国籍を離脱した者等の出入国管理に関する特例法) — https://japanlaw.org/en/special-act-on-immigration-control
  - Amended by Act Partially Amending the Code of Criminal Procedure, etc. to Respond to Advances in Information and Communications Technology, etc. (Act No. 39 of 2025) (情報通信技術の進展等に対応するための刑事訴訟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/507AC0000000039 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000039)
    Listed with the law's amendments: https://japanlaw.org/en/special-act-on-immigration-control/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/403AC0000000071/20250523_507AC0000000039
- Code of Civil Procedure (民事訴訟法) — https://japanlaw.org/en/code-of-civil-procedure
  - Amended by Act Partially Amending the Code of Criminal Procedure, etc. to Respond to Advances in Information and Communications Technology, etc. (Act No. 39 of 2025) (情報通信技術の進展等に対応するための刑事訴訟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/507AC0000000039 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000039)
    Listed with the law's amendments: https://japanlaw.org/en/code-of-civil-procedure/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/408AC0000000109/20250523_507AC0000000039
- 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 Act on the Use of Numbers to Identify a Specific Individual in Administrative Procedures and the Residential Basic Book Act (Act No. 38 of 2025) (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及び住民基本台帳法の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000038 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000038)
    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/425AC0000000027/20250523_507AC0000000038
- Act on Preventing Delay in Payment to Small and Medium-Sized Entrusted Business Operators in Relation to Manufacturing Consignment (製造委託等に係る中小受託事業者に対する代金の支払の遅延等の防止に関する法律) — https://japanlaw.org/en/small-contractor-payment-act
  - Amended by Act Partially Amending the Act against Delay in Payment of Subcontract Proceeds, etc. to Subcontractors and the Act on the Promotion of Subcontracting Small and Medium-Sized Enterprises (Act No. 41 of 2025) (下請代金支払遅延等防止法及び下請中小企業振興法の一部を改正する法律)
    The Act, and every law here it amends: https://japanlaw.org/en/acts/507AC0000000041 (as Markdown: https://japanlaw.org/md/en/acts/507AC0000000041)
    Listed with the law's amendments: https://japanlaw.org/en/small-contractor-payment-act/amendments; the text on e-Gov: https://laws.e-gov.go.jp/law/331AC0000000120/20250523_507AC0000000041

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

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## Sources

- Amendments and their dates: e-Gov (Digital Agency) (10 records)
- English names of the laws: Japanese Law Translation, Ministry of Justice (9 records)
- English names of the laws: Written for this site with AI
- English titles of the amending laws: Written for this site with AI