# 刑事訴訟法 / Code of Criminal Procedure — 第一条 (Supplementary Provisions, Article 1)

This is the Markdown twin of https://japanlaw.org/en/code-of-criminal-procedure/suppl-5051-66/art-1. 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: 刑事訴訟法 (Code of Criminal Procedure), 昭和二十三年法律第百三十一号
- English title "Code of Criminal Procedure": 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-5051-66/art-1`
- Text in force since: 2026-10-20
- URL (the page that opens at this provision): https://japanlaw.org/en/code-of-criminal-procedure/suppl-5051-66/art-1
- e-Gov law ID: 323AC0000000131 — never renamed. A permanent link, `/l/{lawId}/{address}` on this site, redirects to the page.
- Every provision below carries its address and its URL 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.

---

### 第一条（施行期日） — Effective Date
<sup>caption: machine translation, not official</sup>
<sup>suppl-5051-66/art-1 · https://japanlaw.org/en/code-of-criminal-procedure/suppl-5051-66/art-1</sup>

**第一項**  この法律は、公布の日から起算して二十日を経過した日から施行する。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-5051-66/art-1/par-1 · https://japanlaw.org/en/code-of-criminal-procedure/suppl-5051-66/art-1/par-1</sup>
This Act comes into effect as of the day on which 20 days have elapsed from the date of promulgation; provided, however, that the provisions set forth in the following items come into effect as of the dates specified respectively in those items.
<sup>machine translation, not official</sup>

  **一**  第二条の規定並びに附則第四条第一項及び第五条の規定　公布の日
  <sup>suppl-5051-66/art-1/par-1/item-1 · https://japanlaw.org/en/code-of-criminal-procedure/suppl-5051-66/art-1/par-1/item-1</sup>
  the provisions of Article 2, and Article 4, paragraph (1) and Article 5 of the Supplementary Provisions: the date of promulgation;
  <sup>machine translation, not official</sup>

  **二**  第三条中刑事訴訟法第三百二十一条の二の次に一条を加える改正規定及び同法第三百二十三条の改正規定並びに附則第四条第三項の規定　公布の日から起算して六月を超えない範囲内において政令で定める日
  <sup>suppl-5051-66/art-1/par-1/item-2 · https://japanlaw.org/en/code-of-criminal-procedure/suppl-5051-66/art-1/par-1/item-2</sup>
  the provision in Article 3 adding one Article after Article 321-2 of the Code of Criminal Procedure, the provision amending Article 323 of that Code, and the provisions of Article 4, paragraph (3) of the Supplementary Provisions: the date specified by Cabinet Order within a period not exceeding six months from the date of promulgation;
  <sup>machine translation, not official</sup>

  **三**  附則第十九条の規定　刑事訴訟法等の一部を改正する法律（令和五年法律第二十八号）附則第一条第四号に定める日
  <sup>suppl-5051-66/art-1/par-1/item-3 · https://japanlaw.org/en/code-of-criminal-procedure/suppl-5051-66/art-1/par-1/item-3</sup>
  the provisions of Article 19 of the Supplementary Provisions: the date prescribed in Article 1, item (iv) of the Supplementary Provisions of the Act Partially Amending the Code of Criminal Procedure, etc. (Act No. 28 of 2023).
  <sup>machine translation, not official</sup>

---

## Cites
- suppl-5051-66/art-1/par-1/item-1: 附則第四条第一項 → 刑事訴訟法 附則第四条第一項 (Supplementary Provisions, Article 4, paragraph (1)), suppl-5051-66/art-4/par-1 — https://japanlaw.org/en/code-of-criminal-procedure/suppl-5051-66/art-4/par-1
- suppl-5051-66/art-1/par-1/item-1: 第五条 → 刑事訴訟法 附則第五条 (Supplementary Provisions, Article 5), suppl-5051-66/art-5 — https://japanlaw.org/en/code-of-criminal-procedure/suppl-5051-66/art-5
- suppl-5051-66/art-1/par-1/item-2: 附則第四条第三項 → 刑事訴訟法 附則第四条第三項 (Supplementary Provisions, Article 4, paragraph (3)), suppl-5051-66/art-4/par-3 — https://japanlaw.org/en/code-of-criminal-procedure/suppl-5051-66/art-4/par-3
- suppl-5051-66/art-1/par-1/item-3: 附則第十九条 → 刑事訴訟法 附則第十九条 (Supplementary Provisions, Article 19), suppl-5051-66/art-19 — https://japanlaw.org/en/code-of-criminal-procedure/suppl-5051-66/art-19
- suppl-5051-66/art-1/par-1/item-3: 刑事訴訟法等の一部を改正する法律（令和五年法律第二十八号）附則第一条第四号 → 刑事訴訟法 附則第一条第一項第四号 (Supplementary Provisions, Article 1, paragraph (1), item (iv)), suppl-5051-28/art-1/par-1/item-4 — https://japanlaw.org/en/code-of-criminal-procedure/suppl-5051-28/art-1/par-1/item-4

## Cited by

1 provision cites this one. No official source publishes this direction.

- 刑事訴訟法 附則第四条第一項（刑事訴訟法の一部改正に伴う経過措置） — https://japanlaw.org/en/code-of-criminal-procedure/suppl-5051-66/art-4/par-1

---

## Sources

- e-Gov 法令検索, Digital Agency (デジタル庁) — 刑事訴訟法 — the text in force from 2026-10-20 (https://laws.e-gov.go.jp/law/323AC0000000131/20261020_508AC0000000067), retrieved 2026-11-06
- Japanese Law Translation Database System, Ministry of Justice (法務省) — Code of Criminal Procedure — Ministry of Justice translation (part 1 of 2) (https://www.japaneselawtranslation.go.jp/en/laws/view/3739/tb), retrieved 2026-11-06
- claude-sonnet-5-5 — Machine translation, batch code-of-criminal-procedure-20261106T054114-019, translated 2026-11-06
- claude-sonnet-5-5 — Machine translation, batch code-of-criminal-procedure-20261106T054114-022, translated 2026-11-06
- claude-sonnet-5-5 — Machine translation, batch code-of-criminal-procedure-20261106T054114-025, translated 2026-11-06
- This site's parser, version 225 — 刑事訴訟法 — structure, counts, cross-references and defined terms, computed 2026-11-06