# 民事訴訟法 / Code of Civil Procedure — 第四十六条 (Article 46) - 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: 第四十六条 (Article 46)（補助参加人に対する裁判の効力） — address `art-46` - Text in force since: 2026-06-24 - URL (the page that opens at this provision): https://japanlaw.org/ja/code-of-civil-procedure/art-46 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/408AC0000000109/art-46 - 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. --- ### 第四十六条（補助参加人に対する裁判の効力） — (Effect of a Judicial Decision Against a Supporting Intervener) caption: Ministry of Justice translation — Japanese Law Translation Database System art-46 · https://japanlaw.org/ja/code-of-civil-procedure/art-46 · https://japanlaw.org/l/408AC0000000109/art-46 **第一項** 補助参加に係る訴訟の裁判は、次に掲げる場合を除き、補助参加人に対してもその効力を有する。 art-46/par-1 · https://japanlaw.org/ja/code-of-civil-procedure/art-46/par-1 · https://japanlaw.org/l/408AC0000000109/art-46/par-1 A judicial decision in litigation that involves a supporting intervention is also effective against the supporting intervener, except in the following cases: Ministry of Justice translation — Japanese Law Translation Database System **一** 前条第一項ただし書の規定により補助参加人が訴訟行為をすることができなかったとき。 art-46/par-1/item-1 · https://japanlaw.org/ja/code-of-civil-procedure/art-46/par-1/item-1 · https://japanlaw.org/l/408AC0000000109/art-46/par-1/item-1 if the supporting intervener is unable to perform a procedural act, pursuant to the provisions of the proviso to paragraph (1) of the preceding Article; Ministry of Justice translation — Japanese Law Translation Database System **二** 前条第二項の規定により補助参加人の訴訟行為が効力を有しなかったとき。 art-46/par-1/item-2 · https://japanlaw.org/ja/code-of-civil-procedure/art-46/par-1/item-2 · https://japanlaw.org/l/408AC0000000109/art-46/par-1/item-2 if a procedural act by the supporting intervener is invalid, pursuant to the provisions of paragraph (2) of the preceding Article; Ministry of Justice translation — Japanese Law Translation Database System **三** 被参加人が補助参加人の訴訟行為を妨げたとき。 art-46/par-1/item-3 · https://japanlaw.org/ja/code-of-civil-procedure/art-46/par-1/item-3 · https://japanlaw.org/l/408AC0000000109/art-46/par-1/item-3 if the party being supported in the intervention interferes with a procedural act by the supporting intervener; Ministry of Justice translation — Japanese Law Translation Database System **四** 被参加人が補助参加人のすることができない訴訟行為を故意又は過失によってしなかったとき。 art-46/par-1/item-4 · https://japanlaw.org/ja/code-of-civil-procedure/art-46/par-1/item-4 · https://japanlaw.org/l/408AC0000000109/art-46/par-1/item-4 if the party being supported in the intervention intentionally or negligently fails to perform a procedural act that a supporting intervener is not permitted to perform. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-46/par-1/item-1: 前条第一項 → 民事訴訟法 第四十五条第一項 (Article 45, paragraph (1)), art-45/par-1 — https://japanlaw.org/ja/code-of-civil-procedure/art-45/par-1 · https://japanlaw.org/l/408AC0000000109/art-45/par-1 - art-46/par-1/item-2: 前条第二項 → 民事訴訟法 第四十五条第二項 (Article 45, paragraph (2)), art-45/par-2 — https://japanlaw.org/ja/code-of-civil-procedure/art-45/par-2 · https://japanlaw.org/l/408AC0000000109/art-45/par-2 ## Cited by 1 provision cites this one. No official source publishes this direction. - 民事訴訟法 第五十三条第四項（訴訟告知） — https://japanlaw.org/ja/code-of-civil-procedure/art-53/par-4 · https://japanlaw.org/l/408AC0000000109/art-53/par-4 --- ## 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