# 家事事件手続法 / Domestic Relations Case Procedure Act — 第五十条 (Article 50) This is the Markdown twin of https://japanlaw.org/en/domestic-relations-case-procedure-act/art-50. 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: 家事事件手続法 (Domestic Relations Case Procedure Act), 平成二十三年法律第五十二号 - English title "Domestic Relations Case Procedure 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: 第五十条 (Article 50)（申立ての変更） — address `art-50` - Text in force since: 2026-06-24 - URL (the page that opens at this provision): https://japanlaw.org/en/domestic-relations-case-procedure-act/art-50 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/423AC0000000052/art-50 - 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. --- ### 第五十条（申立ての変更） — (Amendment to Petitions) caption: Ministry of Justice translation — Japanese Law Translation Database System art-50 · https://japanlaw.org/en/domestic-relations-case-procedure-act/art-50 · https://japanlaw.org/l/423AC0000000052/art-50 **第一項** 申立人は、申立ての基礎に変更がない限り、申立ての趣旨又は理由を変更することができる。ただし、第七十一条（第百八十八条第四項において準用する場合を含む。）の規定により審理を終結した後は、この限りでない。 art-50/par-1 · https://japanlaw.org/en/domestic-relations-case-procedure-act/art-50/par-1 · https://japanlaw.org/l/423AC0000000052/art-50/par-1 A petitioner may amend the object of or reasons for petition unless there is any change to the basis for the petition; provided, however, that this does not apply after proceedings have been concluded pursuant to the provisions of Article 71 (including the cases where applied mutatis mutandis pursuant to Article 188, paragraph (4)). Ministry of Justice translation — Japanese Law Translation Database System **第二項** 申立ての趣旨又は理由の変更は、家事審判の手続の期日においてする場合を除き、書面でしなければならない。 art-50/par-2 · https://japanlaw.org/en/domestic-relations-case-procedure-act/art-50/par-2 · https://japanlaw.org/l/423AC0000000052/art-50/par-2 An amendment to the object of or reasons for a petition must be made in writing except when it is made on a date for proceedings for adjudication of domestic relations. Ministry of Justice translation — Japanese Law Translation Database System **第三項** 家庭裁判所は、申立ての趣旨又は理由の変更が不適法であるときは、その変更を許さない旨の裁判をしなければならない。 art-50/par-3 · https://japanlaw.org/en/domestic-relations-case-procedure-act/art-50/par-3 · https://japanlaw.org/l/423AC0000000052/art-50/par-3 If an amendment to the object of or reasons for a petition is unlawful, the family court must make a judicial decision not to permit the amendment. Ministry of Justice translation — Japanese Law Translation Database System **第四項** 申立ての趣旨又は理由の変更により家事審判の手続が著しく遅滞することとなるときは、家庭裁判所は、その変更を許さない旨の裁判をすることができる。 art-50/par-4 · https://japanlaw.org/en/domestic-relations-case-procedure-act/art-50/par-4 · https://japanlaw.org/l/423AC0000000052/art-50/par-4 If an amendment to the object of or reasons for a petition would substantially delay proceedings for adjudication of domestic relations, the family court may make a judicial decision not to permit the amendment. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-50/par-1: 第七十一条 → 家事事件手続法 第七十一条 (Article 71), art-71 — https://japanlaw.org/en/domestic-relations-case-procedure-act/art-71 · https://japanlaw.org/l/423AC0000000052/art-71 - art-50/par-1: 第百八十八条第四項 → 家事事件手続法 第百八十八条第四項 (Article 188, paragraph (4)), art-188/par-4 — https://japanlaw.org/en/domestic-relations-case-procedure-act/art-188/par-4 · https://japanlaw.org/l/423AC0000000052/art-188/par-4 ## Cited by 3 provisions cite this one. No official source publishes this direction. - 家事事件手続法 第二百一条第六項 — https://japanlaw.org/en/domestic-relations-case-procedure-act/art-201/par-6 · https://japanlaw.org/l/423AC0000000052/art-201/par-6 - 家事事件手続法 第二百五十五条第四項（家事調停の申立て） — https://japanlaw.org/en/domestic-relations-case-procedure-act/art-255/par-4 · https://japanlaw.org/l/423AC0000000052/art-255/par-4 - 家事事件手続法 第二百六十条第一項第五号（調停委員会等の権限） — https://japanlaw.org/en/domestic-relations-case-procedure-act/art-260/par-1/item-5 · https://japanlaw.org/l/423AC0000000052/art-260/par-1/item-5 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 家事事件手続法 — the text in force from 2026-06-24 (https://laws.e-gov.go.jp/law/423AC0000000052/20260624_508AC0000000045), retrieved 2026-11-05 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Domestic Relations Case Procedure Act — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/4512/tb), retrieved 2026-11-05 - This site's parser, version 225 — 家事事件手続法 — structure, counts, cross-references and defined terms, computed 2026-11-05