# 民法 / Civil Code — 第百条 (Article 100)

- 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: 第百条 (Article 100)（本人のためにすることを示さない意思表示） — address `art-100`
- Text in force since: 2026-06-24
- URL (the page that opens at this provision): https://japanlaw.org/en/civil-code/art-100
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/129AC0000000089/art-100
- 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.

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### 第百条（本人のためにすることを示さない意思表示） — (Manifestation of Intention That the Agent Does Not Indicate as Being Made on Behalf of the Principal)
<sup>caption: Ministry of Justice translation — Japanese Law Translation Database System</sup>
<sup>art-100 · https://japanlaw.org/en/civil-code/art-100 · https://japanlaw.org/l/129AC0000000089/art-100</sup>

    **第一項**  代理人が本人のためにすることを示さないでした意思表示は、自己のためにしたものとみなす。ただし、相手方が、代理人が本人のためにすることを知り、又は知ることができたときは、前条第一項の規定を準用する。
    <sup>art-100/par-1 · https://japanlaw.org/en/civil-code/art-100/par-1 · https://japanlaw.org/l/129AC0000000089/art-100/par-1</sup>
    A manifestation of intention that an agent makes without having indicated that they will be acting on behalf of the principal is deemed to be one that the agent has made on their own account; provided, however, that if the other party knew or could have known that the agent was acting on behalf of the principal, the provisions of paragraph (1) of the preceding Article apply mutatis mutandis.
    <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

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## Cites
- art-100/par-1: 前条第一項 → 民法 第九十九条第一項 (Article 99, paragraph (1)), art-99/par-1 — https://japanlaw.org/en/civil-code/art-99/par-1 · https://japanlaw.org/l/129AC0000000089/art-99/par-1

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## 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