# 民事訴訟法 / Code of Civil Procedure — 第三百条 (Article 300) - 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: 第三百条 (Article 300)（反訴の提起等） — address `art-300` - Text in force since: 2026-06-24 - URL (the page that opens at this provision): https://japanlaw.org/en/code-of-civil-procedure/art-300 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/408AC0000000109/art-300 - 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. --- ### 第三百条（反訴の提起等） — (Filing of a Counterclaim) caption: Ministry of Justice translation — Japanese Law Translation Database System art-300 · https://japanlaw.org/en/code-of-civil-procedure/art-300 · https://japanlaw.org/l/408AC0000000109/art-300 **第一項** 控訴審においては、反訴の提起は、相手方の同意がある場合に限り、することができる。 art-300/par-1 · https://japanlaw.org/en/code-of-civil-procedure/art-300/par-1 · https://japanlaw.org/l/408AC0000000109/art-300/par-1 In the second instance, a counterclaim may be filed only with the consent of the adverse party. Ministry of Justice translation — Japanese Law Translation Database System **第二項** 相手方が異議を述べないで反訴の本案について弁論をしたときは、反訴の提起に同意したものとみなす。 art-300/par-2 · https://japanlaw.org/en/code-of-civil-procedure/art-300/par-2 · https://japanlaw.org/l/408AC0000000109/art-300/par-2 If the adverse party presents an oral argument on the merits of a counterclaim without stating an objection to it, the adverse party is deemed to have consented to the filing of the counterclaim. Ministry of Justice translation — Japanese Law Translation Database System **第三項** 前二項の規定は、選定者に係る請求の追加について準用する。 art-300/par-3 · https://japanlaw.org/en/code-of-civil-procedure/art-300/par-3 · https://japanlaw.org/l/408AC0000000109/art-300/par-3 The provisions of the preceding two paragraphs apply mutatis mutandis to the addition of a claim concerning a person who has appointed someone to act as a lead party. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-300/par-3: 前二項 → 民事訴訟法 第三百条第一項 (Article 300, paragraph (1)), art-300/par-1 — https://japanlaw.org/en/code-of-civil-procedure/art-300/par-1 · https://japanlaw.org/l/408AC0000000109/art-300/par-1 - art-300/par-3: 前二項 → 民事訴訟法 第三百条第二項 (Article 300, paragraph (2)), art-300/par-2 — https://japanlaw.org/en/code-of-civil-procedure/art-300/par-2 · https://japanlaw.org/l/408AC0000000109/art-300/par-2 ## Cited by 1 provision cites this one. No official source publishes this direction. - 民事訴訟法 第三百条第三項（反訴の提起等） — https://japanlaw.org/en/code-of-civil-procedure/art-300/par-3 · https://japanlaw.org/l/408AC0000000109/art-300/par-3 --- ## 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