# 民法 / Civil Code — 第百一条 (Article 101) - 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: 第百一条 (Article 101)（代理行為の瑕疵） — address `art-101` - Text in force since: 2026-06-24 - URL (the page that opens at this provision): https://japanlaw.org/ja/civil-code/art-101 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/129AC0000000089/art-101 - 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. --- ### 第百一条（代理行為の瑕疵） — (Defects in Acts of Agency) caption: Ministry of Justice translation — Japanese Law Translation Database System art-101 · https://japanlaw.org/ja/civil-code/art-101 · https://japanlaw.org/l/129AC0000000089/art-101 **第一項** 代理人が相手方に対してした意思表示の効力が意思の不存在、錯誤、詐欺、強迫又はある事情を知っていたこと若しくは知らなかったことにつき過失があったことによって影響を受けるべき場合には、その事実の有無は、代理人について決するものとする。 art-101/par-1 · https://japanlaw.org/ja/civil-code/art-101/par-1 · https://japanlaw.org/l/129AC0000000089/art-101/par-1 If the validity of a manifestation of intention that an agent has made to the other party is to be influenced by the absence of intention, by mistake, by fraud, or by duress; by the recipient's knowledge of or negligence in not knowing of a particular circumstance; whether or not any fact was present is decided as it concerns the agent. Ministry of Justice translation — Japanese Law Translation Database System **第二項** 相手方が代理人に対してした意思表示の効力が意思表示を受けた者がある事情を知っていたこと又は知らなかったことにつき過失があったことによって影響を受けるべき場合には、その事実の有無は、代理人について決するものとする。 art-101/par-2 · https://japanlaw.org/ja/civil-code/art-101/par-2 · https://japanlaw.org/l/129AC0000000089/art-101/par-2 If the validity of a manifestation of intention that the other party has made to the agent is to be influenced by the recipient's knowledge of or negligence in not knowing of a particular circumstance, whether or not any fact was present is decided as it concerns the agent. Ministry of Justice translation — Japanese Law Translation Database System **第三項** 特定の法律行為をすることを委託された代理人がその行為をしたときは、本人は、自ら知っていた事情について代理人が知らなかったことを主張することができない。本人が過失によって知らなかった事情についても、同様とする。 art-101/par-3 · https://japanlaw.org/ja/civil-code/art-101/par-3 · https://japanlaw.org/l/129AC0000000089/art-101/par-3 If an agent who has been entrusted with performing a specific juridical act performs that act, the principal may not assert that the agent did not know of any particular circumstance of which the principal knew. The same applies to any circumstance of which the principal did not know due to the principal's own negligence. Ministry of Justice translation — Japanese Law Translation Database System --- ## 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