# 民法 / Civil Code — 第七百三条 (Article 703) - 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: 第七百三条 (Article 703)（不当利得の返還義務） — address `art-703` - Text in force since: 2026-06-24 - URL (the page that opens at this provision): https://japanlaw.org/ja/civil-code/art-703 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/129AC0000000089/art-703 - 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. --- ### 第七百三条（不当利得の返還義務） — (Obligation to Return Unjust Enrichment) caption: Ministry of Justice translation — Japanese Law Translation Database System art-703 · https://japanlaw.org/ja/civil-code/art-703 · https://japanlaw.org/l/129AC0000000089/art-703 **第一項** 法律上の原因なく他人の財産又は労務によって利益を受け、そのために他人に損失を及ぼした者（以下この章において「受益者」という。）は、その利益の存する限度において、これを返還する義務を負う。 art-703/par-1 · https://japanlaw.org/ja/civil-code/art-703/par-1 · https://japanlaw.org/l/129AC0000000089/art-703/par-1 A person that has benefited (in this Chapter referred to as "beneficiary" below) from the property or labor of another person without legal cause and has thereby caused a loss to another person bears the duty to return that benefit, to the extent the benefit exists. Ministry of Justice translation — Japanese Law Translation Database System ## Cited by 2 provisions cite this one. No official source publishes this direction. - 建物の区分所有等に関する法律 附則第二条第三項（経過措置） — https://japanlaw.org/ja/building-unit-ownership-act/suppl-3371-69/art-2/par-3 · https://japanlaw.org/l/337AC0000000069/suppl-3371-69/art-2/par-3 - 民法 第二百四十八条第一項（付合、混和又は加工に伴う償金の請求） — https://japanlaw.org/ja/civil-code/art-248/par-1 · https://japanlaw.org/l/129AC0000000089/art-248/par-1 --- ## 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 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