# 民法 / Civil Code — 第五百十五条 (Article 515)

- 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: 第五百十五条 (Article 515)（債権者の交替による更改） — address `art-515`
- Text in force since: 2026-06-24
- URL (the page that opens at this provision): https://japanlaw.org/en/civil-code/art-515
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/129AC0000000089/art-515
- 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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### 第五百十五条（債権者の交替による更改） — (Novation by Substitution of Obligee)
<sup>caption: Ministry of Justice translation — Japanese Law Translation Database System</sup>
<sup>art-515 · https://japanlaw.org/en/civil-code/art-515 · https://japanlaw.org/l/129AC0000000089/art-515</sup>

      **第一項**  債権者の交替による更改は、更改前の債権者、更改後に債権者となる者及び債務者の契約によってすることができる。
      <sup>art-515/par-1 · https://japanlaw.org/en/civil-code/art-515/par-1 · https://japanlaw.org/l/129AC0000000089/art-515/par-1</sup>
      A novation by substitution of obligee may be effected by a contract concluded among the obligee before the novation, a person that becomes the obligee after the novation, and the obligor.
      <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

      **第二項**  債権者の交替による更改は、確定日付のある証書によってしなければ、第三者に対抗することができない。
      <sup>art-515/par-2 · https://japanlaw.org/en/civil-code/art-515/par-2 · https://japanlaw.org/l/129AC0000000089/art-515/par-2</sup>
      A novation by substitution of obligee may not be duly asserted against a third party unless it is made using an instrument bearing a certified date.
      <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

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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