# 民法 / Civil Code — 第三十条 (Supplementary Provisions, Article 30)

- 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: 第三十条 (Supplementary Provisions, Article 30)（契約の効力に関する経過措置） — address `suppl-4291-44/art-30`
- Text in force since: 2026-06-24
- URL (the page that opens at this provision): https://japanlaw.org/ja/civil-code/suppl-4291-44/art-30
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/129AC0000000089/suppl-4291-44/art-30
- 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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### 第三十条（契約の効力に関する経過措置） — Transitional Measures Concerning Effect of Contracts
<sup>caption: machine translation, not official</sup>
<sup>suppl-4291-44/art-30 · https://japanlaw.org/ja/civil-code/suppl-4291-44/art-30 · https://japanlaw.org/l/129AC0000000089/suppl-4291-44/art-30</sup>

**第一項**  施行日前に締結された契約に係る同時履行の抗弁及び危険負担については、なお従前の例による。
<sup>suppl-4291-44/art-30/par-1 · https://japanlaw.org/ja/civil-code/suppl-4291-44/art-30/par-1 · https://japanlaw.org/l/129AC0000000089/suppl-4291-44/art-30/par-1</sup>
With regard to the defense of simultaneous performance and the bearing of risk relating to a contract concluded before the Effective Date, the provisions then in force continue to govern.
<sup>machine translation, not official</sup>

**第二項**  新法第五百三十七条第二項及び第五百三十八条第二項の規定は、施行日前に締結された第三者のためにする契約については、適用しない。
<sup>suppl-4291-44/art-30/par-2 · https://japanlaw.org/ja/civil-code/suppl-4291-44/art-30/par-2 · https://japanlaw.org/l/129AC0000000089/suppl-4291-44/art-30/par-2</sup>
The provisions of Article 537, paragraph (2) and Article 538, paragraph (2) of the New Act do not apply to a third party beneficiary contract concluded before the Effective Date.
<sup>machine translation, not official</sup>

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## Cites
- suppl-4291-44/art-30/par-2: 新法第五百三十七条第二項 → 民法 第五百三十七条第二項 (Article 537, paragraph (2)), art-537/par-2 — https://japanlaw.org/ja/civil-code/art-537/par-2 · https://japanlaw.org/l/129AC0000000089/art-537/par-2
- suppl-4291-44/art-30/par-2: 第五百三十八条第二項 → 民法 第五百三十八条第二項 (Article 538, paragraph (2)), art-538/par-2 — https://japanlaw.org/ja/civil-code/art-538/par-2 · https://japanlaw.org/l/129AC0000000089/art-538/par-2

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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
- claude-sonnet-5-5 — Machine translation, batch civil-code-20261011T170941-023, translated 2026-10-12
- This site's parser, version 190 — 民法 — structure, counts, cross-references and defined terms, computed 2026-10-11