# 少年法 / Juveniles Act — 第一条 (Supplementary Provisions, Article 1)
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- Law: 少年法 (Juveniles Act), 昭和二十三年法律第百六十八号
- English title "Juveniles Act": 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: 第一条 (Supplementary Provisions, Article 1)（施行期日） — address `suppl-4161-62/art-1`
- Text in force since: 2026-06-24
- URL (the page that opens at this provision): https://japanlaw.org/ja/juvenile-act/suppl-4161-62/art-1
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/323AC0000000168/suppl-4161-62/art-1
- 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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### 第一条（施行期日） — Effective Date
caption: machine translation, not official
suppl-4161-62/art-1 · https://japanlaw.org/ja/juvenile-act/suppl-4161-62/art-1 · https://japanlaw.org/l/323AC0000000168/suppl-4161-62/art-1
**第一項** この法律は、公布の日から起算して一年六月を超えない範囲内において政令で定める日から施行する。ただし、次の各号に掲げる規定は、当該各号に定める日から施行する。
suppl-4161-62/art-1/par-1 · https://japanlaw.org/ja/juvenile-act/suppl-4161-62/art-1/par-1 · https://japanlaw.org/l/323AC0000000168/suppl-4161-62/art-1/par-1
This Act comes into effect on the date specified by Cabinet Order within a period not exceeding one year and six months from the date of promulgation; provided, however, that the provisions listed in the following items come into effect as of the date specified in the respective items.
machine translation, not official
**一** 第一条（刑事訴訟法第三十一条の次に一条を加える改正規定、同法第三十六条の次に二条を加える改正規定、同法第三十七条の次に四条を加える改正規定、同法第三十八条第一項を改め、同条の次に三条を加える改正規定、同法第五十八条及び第八十九条の改正規定、同法第百八十一条に一項を加える改正規定、同法第百八十三条に一項を加える改正規定、同法第百八十七条の次に一条を加える改正規定、同法第二百三条第二項の次に一項を加える改正規定、同法第二百四条第二項を改め、同条第一項の次に一項を加える改正規定、同法第二百五条に一項を加える改正規定、同法第二百七条第二項を改め、同条第一項の次に二項を加える改正規定、同法第二百七十二条に一項を加える改正規定、同法第三百十三条の次に一条を加える改正規定、同法第二編中第三章の次に一章を加える改正規定、同法第四百三条の次に一条を加える改正規定、同法第四百十三条の次に一条を加える改正規定、同法第五百条の次に三条を加える改正規定並びに第五百三条及び第五百四条の改正規定に限る。）、第四条、次条並びに附則第三条及び第九条の規定 公布の日から起算して二年六月を超えない範囲内において政令で定める日
suppl-4161-62/art-1/par-1/item-1 · https://japanlaw.org/ja/juvenile-act/suppl-4161-62/art-1/par-1/item-1 · https://japanlaw.org/l/323AC0000000168/suppl-4161-62/art-1/par-1/item-1
the provisions of Article 1 (limited to the provision adding one Article after Article 31 of the Code of Criminal Procedure, the provision adding two Articles after Article 36 of that Act, the provision adding four Articles after Article 37 of that Act, the provision amending Article 38, paragraph (1) of that Act and adding three Articles after that Article, the provisions amending Articles 58 and 89 of that Act, the provision adding one paragraph to Article 181 of that Act, the provision adding one paragraph to Article 183 of that Act, the provision adding one Article after Article 187 of that Act, the provision adding one paragraph after Article 203, paragraph (2) of that Act, the provision amending Article 204, paragraph (2) of that Act and adding one paragraph after paragraph (1) of that Article, the provision adding one paragraph to Article 205 of that Act, the provision amending Article 207, paragraph (2) of that Act and adding two paragraphs after paragraph (1) of that Article, the provision adding one paragraph to Article 272 of that Act, the provision adding one Article after Article 313 of that Act, the provision adding one Chapter after Chapter III in Part II of that Act, the provision adding one Article after Article 403 of that Act, the provision adding one Article after Article 413 of that Act, the provision adding three Articles after Article 500 of that Act, and the provisions amending Articles 503 and 504 of that Act), Article 4, the following Article, and Articles 3 and 9 of the Supplementary Provisions: the date specified by Cabinet Order within a period not exceeding two years and six months from the date of promulgation.
machine translation, not official
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## Sources
- e-Gov 法令検索, Digital Agency (デジタル庁) — 少年法 — the text in force from 2026-06-24 (https://laws.e-gov.go.jp/law/323AC0000000168/20260624_508AC0000000046), retrieved 2026-11-02
- Japanese Law Translation Database System, Ministry of Justice (法務省) — Juveniles Act — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/4827/tb), retrieved 2026-11-02
- claude-sonnet-5-5 — Machine translation, batch juvenile-act-20261102T172711-003, translated 2026-11-03
- claude-sonnet-5-5 — Machine translation, batch juvenile-act-20261102T172711-004, translated 2026-11-03
- claude-sonnet-5-5, corrected on review by claude-opus-5-5 — Machine translation corrected on review, batch juvenile-act-20261102T172711-004, translated 2026-11-03
- This site's parser, version 223 — 少年法 — structure, counts, cross-references and defined terms, computed 2026-11-02