# 会社法 / Companies Act — 第七百八十条 (Article 780) - Law: 会社法 (Companies Act), 平成十七年法律第八十六号 - English title "Companies 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: 第七百八十条 (Article 780)（組織変更の効力発生日の変更） — address `art-780` - Text in force since: 2026-08-12 - URL (the page that opens at this provision): https://japanlaw.org/ja/companies-act/art-780 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/417AC0000000086/art-780 - 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. --- ### 第七百八十条（組織変更の効力発生日の変更） — (Change of the Effective Day of Entity Conversion) caption: Ministry of Justice translation — Japanese Law Translation Database System art-780 · https://japanlaw.org/ja/companies-act/art-780 · https://japanlaw.org/l/417AC0000000086/art-780 **第一項** 組織変更をする株式会社は、効力発生日を変更することができる。 art-780/par-1 · https://japanlaw.org/ja/companies-act/art-780/par-1 · https://japanlaw.org/l/417AC0000000086/art-780/par-1 A stock company effecting entity conversion may change the effective day. Ministry of Justice translation — Japanese Law Translation Database System **第二項** 前項の場合には、組織変更をする株式会社は、変更前の効力発生日（変更後の効力発生日が変更前の効力発生日前の日である場合にあっては、当該変更後の効力発生日）の前日までに、変更後の効力発生日を公告しなければならない。 art-780/par-2 · https://japanlaw.org/ja/companies-act/art-780/par-2 · https://japanlaw.org/l/417AC0000000086/art-780/par-2 In the cases prescribed in the preceding paragraph, the stock company effecting entity conversion must give public notice of the changed effective day by the day immediately preceding the original effective day (or, immediately preceding the changed effective day, if the changed effective day comes before the original effective day). Ministry of Justice translation — Japanese Law Translation Database System **第三項** 第一項の規定により効力発生日を変更したときは、変更後の効力発生日を効力発生日とみなして、この款及び第七百四十五条の規定を適用する。 art-780/par-3 · https://japanlaw.org/ja/companies-act/art-780/par-3 · https://japanlaw.org/l/417AC0000000086/art-780/par-3 When the effective day is changed pursuant to the provisions of paragraph (1), the provisions of this subsection and Article 745 apply by deeming the changed effective day to be the effective day. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-780/par-2: 前項 → 会社法 第七百八十条第一項 (Article 780, paragraph (1)), art-780/par-1 — https://japanlaw.org/ja/companies-act/art-780/par-1 · https://japanlaw.org/l/417AC0000000086/art-780/par-1 - art-780/par-3: 第一項 → 会社法 第七百八十条第一項 (Article 780, paragraph (1)), art-780/par-1 — https://japanlaw.org/ja/companies-act/art-780/par-1 · https://japanlaw.org/l/417AC0000000086/art-780/par-1 - art-780/par-3: 第七百四十五条 → 会社法 第七百四十五条 (Article 745), art-745 — https://japanlaw.org/ja/companies-act/art-745 · https://japanlaw.org/l/417AC0000000086/art-745 ## Cited by 3 provisions cite this one. No official source publishes this direction. - 会社法 第七百八十条第二項（組織変更の効力発生日の変更） — https://japanlaw.org/ja/companies-act/art-780/par-2 · https://japanlaw.org/l/417AC0000000086/art-780/par-2 - 会社法 第七百八十条第三項（組織変更の効力発生日の変更） — https://japanlaw.org/ja/companies-act/art-780/par-3 · https://japanlaw.org/l/417AC0000000086/art-780/par-3 - 会社法 第七百八十一条第二項 — https://japanlaw.org/ja/companies-act/art-781/par-2 · https://japanlaw.org/l/417AC0000000086/art-781/par-2 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 会社法 — the text in force from 2026-08-12 (https://laws.e-gov.go.jp/law/417AC0000000086/20260812_508AC0000000064), retrieved 2026-09-17 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Companies Act — Ministry of Justice translation (part 1 of 2) (https://www.japaneselawtranslation.go.jp/en/laws/view/4481/tb), retrieved 2026-09-17 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Companies Act — Ministry of Justice translation (part 2 of 2) (https://www.japaneselawtranslation.go.jp/en/laws/view/4482/tb), retrieved 2026-09-17 - This site's parser, version 211 — 会社法 — structure, counts, cross-references and defined terms, computed 2026-09-17