# 少年法 / Juveniles Act — 附　則 (Supplementary Provisions)

This is the Markdown twin of https://japanlaw.org/ja/juvenile-act/suppl-4191-88. Every law, and how to address a provision: https://japanlaw.org/llms.txt. The same laws as MCP tools (no sign-in): https://japanlaw.org/mcp.

- 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: 附　則 (Supplementary Provisions) — address `suppl-4191-88`
- Text in force since: 2026-06-24
- URL (the page that opens at this provision): https://japanlaw.org/ja/juvenile-act/suppl-4191-88
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/323AC0000000168/suppl-4191-88
- 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.

---

## 附　則 平成一九年六月一五日法律第八八号
<sup>suppl-4191-88 · https://japanlaw.org/ja/juvenile-act/suppl-4191-88 · https://japanlaw.org/l/323AC0000000168/suppl-4191-88</sup>

### 第一条（施行期日） — Effective Date
<sup>caption: machine translation, not official</sup>
<sup>suppl-4191-88/art-1 · https://japanlaw.org/ja/juvenile-act/suppl-4191-88/art-1 · https://japanlaw.org/l/323AC0000000168/suppl-4191-88/art-1</sup>

**第一項**  この法律は、公布の日から起算して一年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。
<sup>suppl-4191-88/art-1/par-1 · https://japanlaw.org/ja/juvenile-act/suppl-4191-88/art-1/par-1 · https://japanlaw.org/l/323AC0000000168/suppl-4191-88/art-1/par-1</sup>
This Act comes into effect as of the day specified by Cabinet Order within a period not exceeding one year from the date of promulgation; provided, however, that the provisions set forth in the following items come into effect as of the days specified in those items.
<sup>machine translation, not official</sup>

  **一**  略
  <sup>suppl-4191-88/art-1/par-1/item-1 · https://japanlaw.org/ja/juvenile-act/suppl-4191-88/art-1/par-1/item-1 · https://japanlaw.org/l/323AC0000000168/suppl-4191-88/art-1/par-1/item-1</sup>
  Omitted
  <sup>machine translation, not official</sup>

  **二**  第五十九条、第六十七条及び第七十条第六項並びに附則第十一条第二項、第十四条及び第二十八条の規定　この法律の施行の日又は少年法等の一部を改正する法律（平成十九年法律第六十八号。附則第十一条において「少年法等一部改正法」という。）の施行の日のいずれか遅い日
  <sup>suppl-4191-88/art-1/par-1/item-2 · https://japanlaw.org/ja/juvenile-act/suppl-4191-88/art-1/par-1/item-2 · https://japanlaw.org/l/323AC0000000168/suppl-4191-88/art-1/par-1/item-2</sup>
  The provisions of Article 59, Article 67, and Article 70, paragraph (6), and Article 11, paragraph (2), Article 14, and Article 28 of the Supplementary Provisions: the later of the date on which this Act comes into effect or the date on which the Act Partially Amending the Juveniles Act, etc. (Act No. 68 of 2007; referred to as the "Juveniles Act, etc. Amendment Act" in Article 11 of the Supplementary Provisions) comes into effect.
  <sup>machine translation, not official</sup>

---

## 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-20261102T172711-005, translated 2026-11-03
- claude-sonnet-5-5, corrected on review by claude-opus-5-5 — Machine translation corrected on review, batch juvenile-act-20261102T172711-005, translated 2026-11-03
- This site's parser, version 220 — 少年法 — structure, counts, cross-references and defined terms, computed 2026-11-02