# 法人税法 / Corporation Tax Act — 第十二条 (Supplementary Provisions, Article 12)

- Law: 法人税法 (Corporation Tax Act), 昭和四十年法律第三十四号
- English title "Corporation Tax Act": Ministry of Justice translation
- Kind: Act — the distinction between 法律 (Act), 政令 (Cabinet Order), 省令 (Ministerial Order) and 条例 (local ordinance) decides who may issue it and what it may say.
- Provision: 第十二条 (Supplementary Provisions, Article 12)（寄附金の損金不算入に関する経過措置） — address `suppl-4231-114/art-12`
- Text in force since: 2026-10-01
- URL (the page that opens at this provision): https://japanlaw.org/ja/corporation-tax-act/suppl-4231-114/art-12
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/340AC0000000034/suppl-4231-114/art-12
- Every provision below carries its address and both URLs on the line under it.
- Japanese text: e-Gov 法令検索, Digital Agency (デジタル庁). English: as marked on each line below.

Only the Japanese as published by the government has legal effect; the text
below is a copy of it. Every English rendering below is a translation and
says which kind: the Ministry of Justice's translation, or this
site's machine translation, whose model and date the Sources list names.
They are never merged and never substituted for one another.

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### 第十二条（寄附金の損金不算入に関する経過措置） — Transitional Measures Concerning Exclusion of Contributions or Donations from Deductible Expenses
<sup>caption: machine translation, not official</sup>
<sup>suppl-4231-114/art-12 · https://japanlaw.org/ja/corporation-tax-act/suppl-4231-114/art-12 · https://japanlaw.org/l/340AC0000000034/suppl-4231-114/art-12</sup>

**第一項**  新法人税法第三十七条第九項及び第十項の規定は、施行日以後に確定申告書等の提出期限が到来する法人税について適用し、施行日前に確定申告書等の提出期限が到来した法人税については、なお従前の例による。
<sup>suppl-4231-114/art-12/par-1 · https://japanlaw.org/ja/corporation-tax-act/suppl-4231-114/art-12/par-1 · https://japanlaw.org/l/340AC0000000034/suppl-4231-114/art-12/par-1</sup>
The provisions of Article 37, paragraphs (9) and (10) of the New Corporation Tax Act apply to corporation tax for which the due date for filing the Final Return, etc. arrives on or after the Effective Date, and the provisions then in force continue to govern corporation tax for which the due date for filing the Final Return, etc. arrived before the Effective Date.
<sup>machine translation, not official</sup>

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## Sources

- e-Gov 法令検索, Digital Agency (デジタル庁) — 法人税法 — the text in force from 2026-10-01 (https://laws.e-gov.go.jp/law/340AC0000000034/20261001_508AC0000000012), retrieved 2026-10-08
- Japanese Law Translation Database System, Ministry of Justice (法務省) — Corporation Tax Act — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/3115/tb), retrieved 2026-10-08
- claude-opus-5-5 — Machine translation, batch corporation-tax-act-20261008T111236-118, translated 2026-10-08
- This site's parser, version 165 — 法人税法 — structure, counts, cross-references and defined terms, computed 2026-10-08