Reliability note

Titles and AI summaries are unofficial English monitoring aids, not legal advice or official translations. Each link opens the original Japanese official source, which remains authoritative.

Act Partially Amending the Income Tax Act and Related Laws (affecting the Act on Special Measures Concerning Taxation)

所得税法等の一部を改正する法律

Published: 2026-03-31 · Source: e-Gov Law Search — Updated Laws · Stage: In Force · Area: Tax / Stamp Duty · Impact (preliminary): Medium · First detected by this dashboard: 2026-09-16

View the original Japanese source More Tax / Stamp Duty updates Search all updates in the dashboard

AI summary

Generated by AI from the Japanese source metadata. It is an unofficial monitoring aid, not legal advice, and may contain errors. The area, stage, and impact labels are preliminary keyword-based triage labels. Confirm every point in the original Japanese source.

Summary

This item, sourced from e-Gov Law Search, concerns an amending law titled 'Act Partially Amending the Income Tax Act and Related Laws' (Reiwa 8 Act No. 12) that revises the Act on Special Measures Concerning Taxation (Showa 32 Act No. 26). According to the metadata, the amending law has a promulgation date of 2026-03-31 and a stated enforcement date of 2026-06-25. The specific content of the amendments is not described in the provided metadata.

Business Impact

Changes to special taxation measures could affect tax planning, filings, or reporting obligations for businesses and individuals subject to the affected provisions. The actual effect depends on the specific amended provisions, which are not detailed here.

Recommended Action

Consider reviewing the official Japanese source on e-Gov Law Search to confirm the enforcement date and the specific provisions amended before drawing any conclusions.

Timeline of related official records

Related official records are linked only when names and instrument numbers match exactly, so this timeline may be incomplete. Dates are as stated by the official sources. It is a monitoring aid, not legal advice; the original Japanese sources are authoritative.

  1. Date not stated by the source — Bill listed by the House of Representatives (Diet session 221) 所得税法等の一部を改正する法律案(審議状況:成立) Dashboard page Original Japanese source
  2. 2026-03-31 — Promulgated (statute recorded by e-Gov Law Search) 所得税法等の一部を改正する法律(令和八年法律第十二号) (this update) Original Japanese source
  3. 2026-04-01 — Effective date stated by e-Gov Law Search 所得税法、租税特別措置法 Dashboard page Original Japanese source
  4. 2026-05-01 — Effective date stated by e-Gov Law Search 租税特別措置法 Dashboard page Original Japanese source
  5. 2026-06-25 — Effective date stated by e-Gov Law Search 租税特別措置法 (this update) Original Japanese source
  6. 2026-07-31 — Effective date stated by e-Gov Law Search 租税特別措置法 Dashboard page Original Japanese source
  7. 2026-10-01 — Effective date stated by e-Gov Law Search 法人税法、租税特別措置法 Dashboard page Original Japanese source
  8. 2026-12-01 — Effective date stated by e-Gov Law Search 所得税法、租税特別措置法 Dashboard page Original Japanese source
  9. 2027-01-01 — Effective date stated by e-Gov Law Search 所得税法、租税特別措置法 Dashboard page Original Japanese source
  10. 2027-05-20 — Effective date stated by e-Gov Law Search 租税特別措置法 Dashboard page Original Japanese source
  11. 2028-04-01 — Effective date stated by e-Gov Law Search 租税特別措置法 Dashboard page Original Japanese source