# 民法 / Civil Code — 第十五条 (Supplementary Provisions, Article 15) - 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: 第十五条 (Supplementary Provisions, Article 15) — address `suppl-4291-44/art-15` - Text in force since: 2026-06-24 - URL (the page that opens at this provision): https://japanlaw.org/en/civil-code/suppl-4291-44/art-15 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/129AC0000000089/suppl-4291-44/art-15 - 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. --- ### 第十五条 suppl-4291-44/art-15 · https://japanlaw.org/en/civil-code/suppl-4291-44/art-15 · https://japanlaw.org/l/129AC0000000089/suppl-4291-44/art-15 **第一項** 施行日前に利息が生じた場合におけるその利息を生ずべき債権に係る法定利率については、新法第四百四条の規定にかかわらず、なお従前の例による。 suppl-4291-44/art-15/par-1 · https://japanlaw.org/en/civil-code/suppl-4291-44/art-15/par-1 · https://japanlaw.org/l/129AC0000000089/suppl-4291-44/art-15/par-1 With regard to the statutory interest rate relating to a claim that is to bear interest in the case where interest arose before the Effective Date, notwithstanding the provisions of Article 404 of the New Act, the provisions then in force continue to govern. machine translation, not official **第二項** 新法第四百四条第四項の規定により法定利率に初めて変動があるまでの各期における同項の規定の適用については、同項中「この項の規定により法定利率に変動があった期のうち直近のもの（以下この項において「直近変動期」という。）」とあるのは「民法の一部を改正する法律（平成二十九年法律第四十四号）の施行後最初の期」と、「直近変動期における法定利率」とあるのは「年三パーセント」とする。 suppl-4291-44/art-15/par-2 · https://japanlaw.org/en/civil-code/suppl-4291-44/art-15/par-2 · https://japanlaw.org/l/129AC0000000089/suppl-4291-44/art-15/par-2 With regard to the application of the provisions of Article 404, paragraph (4) of the New Act to each term until the first change in the statutory interest rate pursuant to the provisions of that paragraph, the phrase "the most recent term during which there was a change in the statutory interest rate pursuant to the provisions of this paragraph (referred to as the 'most recent term of change' in this paragraph below)" in that paragraph is deemed to be replaced with "the first term after the enforcement of the Act for Partially Amending the Civil Code (Act No. 44 of 2017)", and the phrase "the statutory interest rate for the most recent term of change" is deemed to be replaced with "3% per annum". machine translation, not official --- ## Cites - suppl-4291-44/art-15/par-1: 新法第四百四条 → 民法 第四百四条 (Article 404), art-404 — https://japanlaw.org/en/civil-code/art-404 · https://japanlaw.org/l/129AC0000000089/art-404 - suppl-4291-44/art-15/par-2: 新法第四百四条第四項 → 民法 第四百四条第四項 (Article 404, paragraph (4)), art-404/par-4 — https://japanlaw.org/en/civil-code/art-404/par-4 · https://japanlaw.org/l/129AC0000000089/art-404/par-4 --- ## 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-20261011T170941-021, translated 2026-10-12 - This site's parser, version 190 — 民法 — structure, counts, cross-references and defined terms, computed 2026-10-11