# 民事訴訟法 / Code of Civil Procedure — 第三十条 (Article 30) - Law: 民事訴訟法 (Code of Civil Procedure), 平成八年法律第百九号 - English title "Code of Civil Procedure": 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: 第三十条 (Article 30)（選定当事者） — address `art-30` - Text in force since: 2026-06-24 - URL (the page that opens at this provision): https://japanlaw.org/en/code-of-civil-procedure/art-30 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/408AC0000000109/art-30 - 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. --- ### 第三十条（選定当事者） — (Appointed Parties) caption: Ministry of Justice translation — Japanese Law Translation Database System art-30 · https://japanlaw.org/en/code-of-civil-procedure/art-30 · https://japanlaw.org/l/408AC0000000109/art-30 **第一項** 共同の利益を有する多数の者で前条の規定に該当しないものは、その中から、全員のために原告又は被告となるべき一人又は数人を選定することができる。 art-30/par-1 · https://japanlaw.org/en/code-of-civil-procedure/art-30/par-1 · https://japanlaw.org/l/408AC0000000109/art-30/par-1 Persons with a common interest that do not fall under the provisions of the preceding Article may appoint one or more persons from among themselves to act as the plaintiff or defendant on behalf of all. Ministry of Justice translation — Japanese Law Translation Database System **第二項** 訴訟の係属の後、前項の規定により原告又は被告となるべき者を選定したときは、他の当事者は、当然に訴訟から脱退する。 art-30/par-2 · https://japanlaw.org/en/code-of-civil-procedure/art-30/par-2 · https://japanlaw.org/l/408AC0000000109/art-30/par-2 If a person is appointed to act as the plaintiff or defendant pursuant to the provisions of the preceding paragraph after litigation has become pending before the court, any plaintiff other than a person selected to act as plaintiff or any defendant other than a person selected to act as defendant is automatically withdrawn from the litigation. Ministry of Justice translation — Japanese Law Translation Database System **第三項** 係属中の訴訟の原告又は被告と共同の利益を有する者で当事者でないものは、その原告又は被告を自己のためにも原告又は被告となるべき者として選定することができる。 art-30/par-3 · https://japanlaw.org/en/code-of-civil-procedure/art-30/par-3 · https://japanlaw.org/l/408AC0000000109/art-30/par-3 A person that shares a common interest with the plaintiff or defendant in pending litigation but that is not a party to the litigation may appoint them to also act as the plaintiff or defendant on their behalf. Ministry of Justice translation — Japanese Law Translation Database System **第四項** 第一項又は前項の規定により原告又は被告となるべき者を選定した者（以下「選定者」という。）は、その選定を取り消し、又は選定された当事者（以下「選定当事者」という。）を変更することができる。 art-30/par-4 · https://japanlaw.org/en/code-of-civil-procedure/art-30/par-4 · https://japanlaw.org/l/408AC0000000109/art-30/par-4 A first person that has appointed a second person to act as plaintiff or defendant pursuant to the provisions of paragraph (1) or the preceding paragraph (the first person is referred to below as an "appointing party") may void their appointment or change the person they have appointed to act as a party to the case ( the second person is referred to below as a "appointed party"). Ministry of Justice translation — Japanese Law Translation Database System **第五項** 選定当事者のうち死亡その他の事由によりその資格を喪失した者があるときは、他の選定当事者において全員のために訴訟行為をすることができる。 art-30/par-5 · https://japanlaw.org/en/code-of-civil-procedure/art-30/par-5 · https://japanlaw.org/l/408AC0000000109/art-30/par-5 If an appointed party dies, or due to other reasons loses that status, another appointed party may perform procedural acts on behalf of all. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-30/par-1: 前条 → 民事訴訟法 第二十九条 (Article 29), art-29 — https://japanlaw.org/en/code-of-civil-procedure/art-29 · https://japanlaw.org/l/408AC0000000109/art-29 - art-30/par-2: 前項 → 民事訴訟法 第三十条第一項 (Article 30, paragraph (1)), art-30/par-1 — https://japanlaw.org/en/code-of-civil-procedure/art-30/par-1 · https://japanlaw.org/l/408AC0000000109/art-30/par-1 - art-30/par-4: 第一項 → 民事訴訟法 第三十条第一項 (Article 30, paragraph (1)), art-30/par-1 — https://japanlaw.org/en/code-of-civil-procedure/art-30/par-1 · https://japanlaw.org/l/408AC0000000109/art-30/par-1 - art-30/par-4: 前項 → 民事訴訟法 第三十条第三項 (Article 30, paragraph (3)), art-30/par-3 — https://japanlaw.org/en/code-of-civil-procedure/art-30/par-3 · https://japanlaw.org/l/408AC0000000109/art-30/par-3 ## Cited by 4 provisions cite this one. No official source publishes this direction. - 民事訴訟法 第三十条第二項（選定当事者） — https://japanlaw.org/en/code-of-civil-procedure/art-30/par-2 · https://japanlaw.org/l/408AC0000000109/art-30/par-2 - 民事訴訟法 第三十条第四項（選定当事者） — https://japanlaw.org/en/code-of-civil-procedure/art-30/par-4 · https://japanlaw.org/l/408AC0000000109/art-30/par-4 - 民事訴訟法 第百四十四条第一項（選定者に係る請求の追加） — https://japanlaw.org/en/code-of-civil-procedure/art-144/par-1 · https://japanlaw.org/l/408AC0000000109/art-144/par-1 - 民事訴訟法 第百四十四条第二項（選定者に係る請求の追加） — https://japanlaw.org/en/code-of-civil-procedure/art-144/par-2 · https://japanlaw.org/l/408AC0000000109/art-144/par-2 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 民事訴訟法 — the text in force from 2026-06-24 (https://laws.e-gov.go.jp/law/408AC0000000109/20260624_508AC0000000046), retrieved 2026-10-17 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Code of Civil Procedure — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/4797/tb), retrieved 2026-10-17 - This site's parser, version 209 — 民事訴訟法 — structure, counts, cross-references and defined terms, computed 2026-10-17