# 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)（法人税法の一部改正に伴う経過措置の原則） — address `suppl-4311-6/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-4311-6/art-12 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/340AC0000000034/suppl-4311-6/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. --- ### 第十二条（法人税法の一部改正に伴う経過措置の原則） — Principle of Transitional Measures Accompanying the Partial Amendment of the Corporation Tax Act caption: machine translation, not official suppl-4311-6/art-12 · https://japanlaw.org/ja/corporation-tax-act/suppl-4311-6/art-12 · https://japanlaw.org/l/340AC0000000034/suppl-4311-6/art-12 **第一項** この附則に別段の定めがあるものを除き、第二条の規定による改正後の法人税法（以下「新法人税法」という。）の規定は、法人（人格のない社団等を含む。以下同じ。）の施行日以後に終了する事業年度の所得に対する法人税及び連結法人の施行日以後に終了する連結事業年度の連結所得に対する法人税について適用し、法人の施行日前に終了した事業年度の所得に対する法人税及び連結法人の施行日前に終了した連結事業年度の連結所得に対する法人税については、なお従前の例による。 suppl-4311-6/art-12/par-1 · https://japanlaw.org/ja/corporation-tax-act/suppl-4311-6/art-12/par-1 · https://japanlaw.org/l/340AC0000000034/suppl-4311-6/art-12/par-1 Unless otherwise provided for in these Supplementary Provisions, the provisions of the Corporation Tax Act as amended by the provisions of Article 2 (hereinafter referred to as "the New Corporation Tax Act") apply to corporation tax on income for business years of corporations (including associations or foundations without juridical personality; the same applies hereinafter) that end on or after the Effective Date and to corporation tax on consolidated income for consolidated business years of consolidated corporations that end on or after the Effective Date, and with regard to corporation tax on income for business years of corporations that ended before the Effective Date and corporation tax on consolidated income for consolidated business years of consolidated corporations that ended before the Effective Date, the provisions then in force continue to govern. machine translation, not official --- ## 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-20261008T111236-133, 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