# 民法 / Civil Code — 第七百七十七条 (Article 777)

- 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: 第七百七十七条 (Article 777)（嫡出否認の訴えの出訴期間） — address `art-777`
- Text in force since: 2026-06-24
- URL (the page that opens at this provision): https://japanlaw.org/en/civil-code/art-777
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/129AC0000000089/art-777
- 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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### 第七百七十七条（嫡出否認の訴えの出訴期間） — (Statute of Limitations for Filing an Action to Rebut the Presumption of Child in Wedlock)
<sup>caption: Ministry of Justice translation — Japanese Law Translation Database System</sup>
<sup>art-777 · https://japanlaw.org/en/civil-code/art-777 · https://japanlaw.org/l/129AC0000000089/art-777</sup>

    **第一項**  次の各号に掲げる否認権の行使に係る嫡出否認の訴えは、それぞれ当該各号に定める時から三年以内に提起しなければならない。
    <sup>art-777/par-1 · https://japanlaw.org/en/civil-code/art-777/par-1 · https://japanlaw.org/l/129AC0000000089/art-777/par-1</sup>
    An action to rebut the presumption of the child in wedlock pertaining to the exercise of a right to rebut the presumption set forth in each of the following items must be filed within three years from the time specified respectively in those items.
    <sup>machine translation, not official</sup>

      **一**  父の否認権　父が子の出生を知った時
      <sup>art-777/par-1/item-1 · https://japanlaw.org/en/civil-code/art-777/par-1/item-1 · https://japanlaw.org/l/129AC0000000089/art-777/par-1/item-1</sup>
      the father's right to rebut the presumption: the time when the father learns of the child's birth;
      <sup>machine translation, not official</sup>

      **二**  子の否認権　その出生の時
      <sup>art-777/par-1/item-2 · https://japanlaw.org/en/civil-code/art-777/par-1/item-2 · https://japanlaw.org/l/129AC0000000089/art-777/par-1/item-2</sup>
      the child's right to rebut the presumption: the time of the child's birth;
      <sup>machine translation, not official</sup>

      **三**  母の否認権　子の出生の時
      <sup>art-777/par-1/item-3 · https://japanlaw.org/en/civil-code/art-777/par-1/item-3 · https://japanlaw.org/l/129AC0000000089/art-777/par-1/item-3</sup>
      the mother's right to rebut the presumption: the time of the child's birth;
      <sup>machine translation, not official</sup>

      **四**  前夫の否認権　前夫が子の出生を知った時
      <sup>art-777/par-1/item-4 · https://japanlaw.org/en/civil-code/art-777/par-1/item-4 · https://japanlaw.org/l/129AC0000000089/art-777/par-1/item-4</sup>
      the former husband's right to rebut the presumption: the time when the former husband learns of the child's birth.
      <sup>machine translation, not official</sup>

## Cited by

7 provisions cite this one. No official source publishes this direction.

- 民法 第七百七十八条第一項 — https://japanlaw.org/en/civil-code/art-778/par-1 · https://japanlaw.org/l/129AC0000000089/art-778/par-1
- 民法 第七百七十八条の二第一項 — https://japanlaw.org/en/civil-code/art-778-2/par-1 · https://japanlaw.org/l/129AC0000000089/art-778-2/par-1
- 民法 第七百七十八条の二第二項 — https://japanlaw.org/en/civil-code/art-778-2/par-2 · https://japanlaw.org/l/129AC0000000089/art-778-2/par-2
- 民法 第七百七十八条の二第四項 — https://japanlaw.org/en/civil-code/art-778-2/par-4 · https://japanlaw.org/l/129AC0000000089/art-778-2/par-4
- 民法 附則第四条第一項（嫡出の否認及び嫡出の承認に関する経過措置） — https://japanlaw.org/en/civil-code/suppl-5041-102/art-4/par-1 · https://japanlaw.org/l/129AC0000000089/suppl-5041-102/art-4/par-1
- 民法 附則第四条第二項（嫡出の否認及び嫡出の承認に関する経過措置） — https://japanlaw.org/en/civil-code/suppl-5041-102/art-4/par-2 · https://japanlaw.org/l/129AC0000000089/suppl-5041-102/art-4/par-2
- 民法 附則第四条第三項（嫡出の否認及び嫡出の承認に関する経過措置） — https://japanlaw.org/en/civil-code/suppl-5041-102/art-4/par-3 · https://japanlaw.org/l/129AC0000000089/suppl-5041-102/art-4/par-3

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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 2 of 2) (https://www.japaneselawtranslation.go.jp/en/laws/view/4275/tb), 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
- claude-sonnet-5-5 — Machine translation, batch civil-code-20261011T170941-002, translated 2026-10-12
- claude-sonnet-5-5 — Machine translation, batch civil-code-20261011T170941-003, translated 2026-10-12
- This site's parser, version 190 — 民法 — structure, counts, cross-references and defined terms, computed 2026-10-11