# 民法 / Civil Code — 第百七十七条 (Article 177) - 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: 第百七十七条 (Article 177)（不動産に関する物権の変動の対抗要件） — address `art-177` - Text in force since: 2026-06-24 - URL (the page that opens at this provision): https://japanlaw.org/ja/civil-code/art-177 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/129AC0000000089/art-177 - 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. --- ### 第百七十七条（不動産に関する物権の変動の対抗要件） — (Requirements of Perfection of Changes in Real Rights on Immovables) caption: Ministry of Justice translation — Japanese Law Translation Database System art-177 · https://japanlaw.org/ja/civil-code/art-177 · https://japanlaw.org/l/129AC0000000089/art-177 **第一項** 不動産に関する物権の得喪及び変更は、不動産登記法（平成十六年法律第百二十三号）その他の登記に関する法律の定めるところに従いその登記をしなければ、第三者に対抗することができない。 art-177/par-1 · https://japanlaw.org/ja/civil-code/art-177/par-1 · https://japanlaw.org/l/129AC0000000089/art-177/par-1 Acquisitions of, losses of and changes in real rights on immovables may not be duly asserted against any third parties, unless the same are registered pursuant to the applicable provisions of the Real Property Registration Act (Act No. 123 of 2004) and other laws regarding registration. Ministry of Justice translation — Japanese Law Translation Database System ## Cited by 1 provision cites this one. No official source publishes this direction. - 建物の区分所有等に関する法律 第十一条第三項（共用部分の共有関係） — https://japanlaw.org/ja/building-unit-ownership-act/art-11/par-3 · https://japanlaw.org/l/337AC0000000069/art-11/par-3 --- ## 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