# 会社法 / Companies Act — 第八百五十一条 (Article 851) This is the Markdown twin of https://japanlaw.org/en/companies-act/art-851. 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. - 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: 第八百五十一条 (Article 851)（株主でなくなった者の訴訟追行） — address `art-851` - Text in force since: 2026-08-12 - URL (the page that opens at this provision): https://japanlaw.org/en/companies-act/art-851 - e-Gov law ID: 417AC0000000086 — never renamed. A permanent link, `/l/{lawId}/{address}` on this site, redirects to the page. - Every provision below carries its address and its URL 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. --- ### 第八百五十一条（株主でなくなった者の訴訟追行） — (Conduct of a Suit of a Person Who Is No Longer a Shareholder) caption: Ministry of Justice translation — Japanese Law Translation Database System art-851 · https://japanlaw.org/en/companies-act/art-851 **第一項** 責任追及等の訴えを提起した株主又は第八百四十九条第一項の規定により共同訴訟人として当該責任追及等の訴えに係る訴訟に参加した株主が当該訴訟の係属中に株主でなくなった場合であっても、次に掲げるときは、その者が、訴訟を追行することができる。 art-851/par-1 · https://japanlaw.org/en/companies-act/art-851/par-1 Even if a shareholder who has filed an action to enforce liability or a shareholder who has intervened in a suit relating to the action to enforce liability as a co-party ceases to be a shareholder during the pendency of relevant suit, that person may conduct the suit in the following cases: Ministry of Justice translation — Japanese Law Translation Database System **一** その者が当該株式会社の株式交換又は株式移転により当該株式会社の完全親会社の株式を取得したとき。 art-851/par-1/item-1 · https://japanlaw.org/en/companies-act/art-851/par-1/item-1 when that person acquires shares in the wholly owning parent company of the relevant stock company through a share exchange or share transfer by that stock company; or Ministry of Justice translation — Japanese Law Translation Database System **二** その者が当該株式会社が合併により消滅する会社となる合併により、合併により設立する株式会社又は合併後存続する株式会社若しくはその完全親会社の株式を取得したとき。 art-851/par-1/item-2 · https://japanlaw.org/en/companies-act/art-851/par-1/item-2 when, through a merger in which the relevant stock company is the company that disappears, that person acquires shares in the stock company incorporated as a result of the merger or acquires shares in the stock company surviving the merger or in its wholly owning parent company. Ministry of Justice translation — Japanese Law Translation Database System **第二項** 前項の規定は、同項第一号（この項又は次項において準用する場合を含む。）に掲げる場合において、前項の株主が同項の訴訟の係属中に当該株式会社の完全親会社の株式の株主でなくなったときについて準用する。この場合において、同項（この項又は次項において準用する場合を含む。）中「当該株式会社」とあるのは、「当該完全親会社」と読み替えるものとする。 art-851/par-2 · https://japanlaw.org/en/companies-act/art-851/par-2 The provisions of the preceding paragraph apply mutatis mutandis when, in the case set forth in item (i) of that paragraph (including the cases where it is applied mutatis mutandis pursuant to this paragraph or the following paragraph), the shareholder referred to in the preceding paragraph ceases to be a shareholder of shares in the wholly owning parent company of the relevant stock company during the pendency of the suit referred to in that paragraph. In these cases, the term "the relevant stock company" in that paragraph (including the cases where it is applied mutatis mutandis pursuant to this paragraph or the following paragraph) is deemed to be replaced with "the relevant wholly owning parent company". Ministry of Justice translation — Japanese Law Translation Database System **第三項** 第一項の規定は、同項第二号（前項又はこの項において準用する場合を含む。）に掲げる場合において、第一項の株主が同項の訴訟の係属中に合併により設立する株式会社又は合併後存続する株式会社若しくはその完全親会社の株式の株主でなくなったときについて準用する。この場合において、同項（前項又はこの項において準用する場合を含む。）中「当該株式会社」とあるのは、「合併により設立する株式会社又は合併後存続する株式会社若しくはその完全親会社」と読み替えるものとする。 art-851/par-3 · https://japanlaw.org/en/companies-act/art-851/par-3 The provisions of paragraph (1) apply mutatis mutandis when, in the case set forth in item (ii) of that paragraph (including the cases where it is applied mutatis mutandis pursuant to the preceding paragraph or this paragraph), the shareholder referred to in paragraph (1) ceases to be a shareholder of shares of the stock company that is incorporated in the merger or the stock company surviving a merger, or the wholly owning parent company thereof, during the pendency of the suit referred to in that paragraph. In these cases, the term "the relevant stock company" in that paragraph (including the cases where it is applied mutatis mutandis pursuant to the preceding paragraph and this paragraph) is deemed to be replaced with "the stock company that is incorporated in the merger or the stock company surviving a merger, or the wholly owning parent company thereof". Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-851/par-1: 第八百四十九条第一項 → 会社法 第八百四十九条第一項 (Article 849, paragraph (1)), art-849/par-1 — https://japanlaw.org/en/companies-act/art-849/par-1 - art-851/par-2: 前項 → 会社法 第八百五十一条第一項 (Article 851, paragraph (1)), art-851/par-1 — https://japanlaw.org/en/companies-act/art-851/par-1 - art-851/par-2: 同項第一号 → 会社法 第八百五十一条第一項第一号 (Article 851, paragraph (1), item (i)), art-851/par-1/item-1 — https://japanlaw.org/en/companies-act/art-851/par-1/item-1 - art-851/par-2: この項 → 会社法 第八百五十一条第二項 (Article 851, paragraph (2)), art-851/par-2 — https://japanlaw.org/en/companies-act/art-851/par-2 - art-851/par-2: 次項 → 会社法 第八百五十一条第三項 (Article 851, paragraph (3)), art-851/par-3 — https://japanlaw.org/en/companies-act/art-851/par-3 - art-851/par-3: 第一項 → 会社法 第八百五十一条第一項 (Article 851, paragraph (1)), art-851/par-1 — https://japanlaw.org/en/companies-act/art-851/par-1 - art-851/par-3: 同項第二号 → 会社法 第八百五十一条第一項第二号 (Article 851, paragraph (1), item (ii)), art-851/par-1/item-2 — https://japanlaw.org/en/companies-act/art-851/par-1/item-2 - art-851/par-3: 前項 → 会社法 第八百五十一条第二項 (Article 851, paragraph (2)), art-851/par-2 — https://japanlaw.org/en/companies-act/art-851/par-2 - art-851/par-3: この項 → 会社法 第八百五十一条第三項 (Article 851, paragraph (3)), art-851/par-3 — https://japanlaw.org/en/companies-act/art-851/par-3 ## Cited by 2 provisions cite this one. No official source publishes this direction. - 会社法 第八百五十一条第二項（株主でなくなった者の訴訟追行） — https://japanlaw.org/en/companies-act/art-851/par-2 - 会社法 第八百五十一条第三項（株主でなくなった者の訴訟追行） — https://japanlaw.org/en/companies-act/art-851/par-3 --- ## 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 224 — 会社法 — structure, counts, cross-references and defined terms, computed 2026-09-17