# 民法 / Civil Code — 第八百六十六条 (Article 866) - Law: 民法 (Civil Code), 明治二十九年法律第八十九号 - English title "Civil Code": 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: 第八百六十六条 (Article 866)（被後見人の財産等の譲受けの取消し） — address `art-866` - Text in force since: 2026-06-24 - URL (the page that opens at this provision): https://japanlaw.org/ja/civil-code/art-866 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/129AC0000000089/art-866 - 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. --- ### 第八百六十六条（被後見人の財産等の譲受けの取消し） — (Ward's Disaffirmance of the Acquisition of Property) caption: Ministry of Justice translation — Japanese Law Translation Database System art-866 · https://japanlaw.org/ja/civil-code/art-866 · https://japanlaw.org/l/129AC0000000089/art-866 **第一項** 後見人が被後見人の財産又は被後見人に対する第三者の権利を譲り受けたときは、被後見人は、これを取り消すことができる。この場合においては、第二十条の規定を準用する。 art-866/par-1 · https://japanlaw.org/ja/civil-code/art-866/par-1 · https://japanlaw.org/l/129AC0000000089/art-866/par-1 If a guardian acquires the property of the ward or the right of a third party against the ward, the ward may disaffirm that acquisition. In this case, the provisions of Article 20 apply mutatis mutandis. Ministry of Justice translation — Japanese Law Translation Database System **第二項** 前項の規定は、第百二十一条から第百二十六条までの規定の適用を妨げない。 art-866/par-2 · https://japanlaw.org/ja/civil-code/art-866/par-2 · https://japanlaw.org/l/129AC0000000089/art-866/par-2 The provisions of the preceding paragraph do not preclude the application of the provisions of Article 121 through Article 126. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-866/par-1: 第二十条 → 民法 第二十条 (Article 20), art-20 — https://japanlaw.org/ja/civil-code/art-20 · https://japanlaw.org/l/129AC0000000089/art-20 - art-866/par-2: 前項 → 民法 第八百六十六条第一項 (Article 866, paragraph (1)), art-866/par-1 — https://japanlaw.org/ja/civil-code/art-866/par-1 · https://japanlaw.org/l/129AC0000000089/art-866/par-1 - art-866/par-2: 第百二十一条から第百二十六条まで → 民法 第百二十一条 (Article 121), art-121 — https://japanlaw.org/ja/civil-code/art-121 · https://japanlaw.org/l/129AC0000000089/art-121 - art-866/par-2: 第百二十一条から第百二十六条まで → 民法 第百二十一条の二 (Article 121-2), art-121-2 — https://japanlaw.org/ja/civil-code/art-121-2 · https://japanlaw.org/l/129AC0000000089/art-121-2 - art-866/par-2: 第百二十一条から第百二十六条まで → 民法 第百二十二条 (Article 122), art-122 — https://japanlaw.org/ja/civil-code/art-122 · https://japanlaw.org/l/129AC0000000089/art-122 - art-866/par-2: 第百二十一条から第百二十六条まで → 民法 第百二十三条 (Article 123), art-123 — https://japanlaw.org/ja/civil-code/art-123 · https://japanlaw.org/l/129AC0000000089/art-123 - art-866/par-2: 第百二十一条から第百二十六条まで → 民法 第百二十四条 (Article 124), art-124 — https://japanlaw.org/ja/civil-code/art-124 · https://japanlaw.org/l/129AC0000000089/art-124 - art-866/par-2: 第百二十一条から第百二十六条まで → 民法 第百二十五条 (Article 125), art-125 — https://japanlaw.org/ja/civil-code/art-125 · https://japanlaw.org/l/129AC0000000089/art-125 - art-866/par-2: 第百二十一条から第百二十六条まで → 民法 第百二十六条 (Article 126), art-126 — https://japanlaw.org/ja/civil-code/art-126 · https://japanlaw.org/l/129AC0000000089/art-126 ## Cited by 2 provisions cite this one. No official source publishes this direction. - 民法 第八百六十六条第二項（被後見人の財産等の譲受けの取消し） — https://japanlaw.org/ja/civil-code/art-866/par-2 · https://japanlaw.org/l/129AC0000000089/art-866/par-2 - 民法 第八百六十七条第二項（未成年被後見人に代わる親権の行使） — https://japanlaw.org/ja/civil-code/art-867/par-2 · https://japanlaw.org/l/129AC0000000089/art-867/par-2 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 民法 — the text in force from 2026-06-24 (https://laws.e-gov.go.jp/law/129AC0000000089/20260624_508AC0000000045), retrieved 2026-10-11 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Civil Code — Ministry of Justice translation (part 2 of 2) (https://www.japaneselawtranslation.go.jp/en/laws/view/4275/tb), retrieved 2026-10-11 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Civil Code — Ministry of Justice translation (part 1 of 2) (https://www.japaneselawtranslation.go.jp/en/laws/view/4848/tb), retrieved 2026-10-11 - This site's parser, version 190 — 民法 — structure, counts, cross-references and defined terms, computed 2026-10-11