# Penal detention (拘留, こうりゅう) This is the Markdown twin of https://japanlaw.org/en/concepts/penal-detention. 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. - Group: Rights, roles and legal effects - URL: https://japanlaw.org/en/concepts/penal-detention - In Japanese: https://japanlaw.org/ja/concepts/penal-detention - Written by: claude-opus-5-5, 2026-10-04 A short criminal punishment of being held in a penal institution (刑事施設) for one day to less than thirty days (Penal Code, Article 16, paragraph (1)). As with imprisonment (拘禁刑), the person may be made to do work or given guidance to help them reform (paragraph (2)). It ranks below a fine (罰金) and above a petty fine (科料) (Articles 9 and 10, paragraph (1)). Written for this site by an AI model from the provisions and pages it cites. Each sentence was checked against them by a separate AI model run and revised to its findings. Not reviewed by a lawyer. ## Provisions and sources it draws on - [Penal Code, Arts. 9, 10, 16](https://laws.e-gov.go.jp/law/140AC0000000045) — on this site: https://japanlaw.org/en/penal-code ## Where the laws use it 2 laws in force use it in this sense, in 16 provisions; there the word opens this explanation. - [Penal Code (刑法)](https://japanlaw.org/en/penal-code): 15 provisions, among them [Article 9](https://japanlaw.org/en/penal-code/art-9), [Article 16](https://japanlaw.org/en/penal-code/art-16), [Article 20](https://japanlaw.org/en/penal-code/art-20) - [Code of Civil Procedure (民事訴訟法)](https://japanlaw.org/en/code-of-civil-procedure): 1 provision, among them [Article 193](https://japanlaw.org/en/code-of-civil-procedure/art-193) ## Related - [Imprisonment (拘禁刑, こうきんけい)](https://japanlaw.org/en/concepts/imprisonment) - [Fine (罰金, ばっきん)](https://japanlaw.org/en/concepts/criminal-fine) - [Petty fine (科料, かりょう)](https://japanlaw.org/en/concepts/petty-fine) - [Confiscation (没収, ぼっしゅう)](https://japanlaw.org/en/concepts/confiscation) --- ## Sources - Explanation: Written for this site with AI (claude-opus-5-5, 2026-10-04) - Where it is used, and how often: Worked out by this site from e-Gov's text - English names of the laws: Japanese Law Translation, Ministry of Justice (2 records)