Every term this law . Its definitions bind only this law — each entry says where the definition applies and links to the sentence that settles it. 27 terms: 4 with the Ministry of Justice's English, 23 in our translation, marked as such.
少年
In this Act, a person who has a legal duty to have custody of and educate a juvenile (少年), or a person who actually has the juvenile in their care.
少年に対して法律上監護教育の義務ある者及び少年を現に監護する者
From Article 62 on, a juvenile (少年) aged 18 or older — that is, aged 18 or 19, since a juvenile under this Act is under 20.
十八歳以上の少年
被害者等
From Article 5-2 on, a victim, the victim's legal representative (法定代理人), or, where the victim has died or has a serious physical or mental disability, the victim's spouse, lineal relative (直系の親族) or brother or sister.
被害者又はその法定代理人若しくは被害者が死亡した場合若しくはその心身に重大な故障がある場合におけるその配偶者、直系の親族若しくは兄弟姉妹
This Act as amended by Article 1 of Act No. 47 of 2021.
In Article 6-5, paragraph (2) and Article 15, an order to provide electronic or magnetic records (電磁的記録) under Article 102-2, paragraph (1) of the Code of Criminal Procedure — an order to provide the records needed by a method it specifies — counting only one that has them recorded or moved, over a telecommunications line, onto a recording medium managed by the person making the order; a police officer investigating the case of a juvenile under 14 who has done an act that breaks a criminal law may make one.
A petition in which a public prosecutor (検察官), where the family court has had a prosecutor take part in the hearing under Article 22-2, paragraph (1), asks a high court within two weeks to accept the case as an appeal court (抗告審) against the decision to impose or not to impose a protective measure (保護処分), on the sole ground of a breach of law or a serious error of fact in finding the delinquent act that affected the decision; it is filed by submitting a written petition to the court that made the decision.
In Article 2 of the supplementary provisions (附則) of Act No. 142 of 2000, the Juveniles Act as amended by Article 1 of that Act.
In the supplementary provisions (附則) of this Act as enacted in 1948, the previous juvenile law, 少年法 (Act No. 42 of 1922), in force before this Act.
従前の少年法（大正十一年法律第四十二号）
In Article 16, paragraph (1) and Article 26, paragraph (1), a child welfare officer as defined in Article 12-3, paragraph (2), item (vi) of the Child Welfare Act: a staff member in charge of affairs concerning the welfare of children.
児童福祉法第十二条の三第二項第六号に規定する児童福祉司
In the supplementary provisions (附則) of Act No. 99 of 1987, the Labor Standards Act as amended by that Act.
In Article 2 of the supplementary provisions (附則) of Act No. 39 of 2025, the Code of Criminal Procedure as it stood before the amendments Article 1 of that Act made to it that come into effect on the date set in Article 1, item (iii) of those supplementary provisions.
In Article 2 of the supplementary provisions (附則) of Act No. 39 of 2025, the Act on Medical Care and Treatment for Persons Who Have Caused Serious Cases Under the Condition of Insanity (心神喪失等の状態で重大な他害行為を行った者の医療及び観察等に関する法律, Act No. 110 of 2003) as it stood before Article 27 of that Act amended its Article 24, paragraphs (3) and (4), the amendment that comes into effect on the date set in Article 1, item (iii) of those supplementary provisions.
In Article 2 of the supplementary provisions (附則) of Act No. 39 of 2025, the Act on International Assistance in Investigations (国際捜査共助等に関する法律, Act No. 69 of 1980) as it stood before Article 18 of that Act amended its Article 8, paragraph (2) and Article 12, the amendments that come into effect on the date set in Article 1, item (iii) of those supplementary provisions.
In Article 2 of the supplementary provisions (附則) of Act No. 39 of 2025, the Juveniles Act as it stood before Article 5 of that Act amended its Articles 6-5 and 15, the amendments that come into effect on the date set in Article 1, item (iii) of those supplementary provisions.
In Article 2 of the supplementary provisions (附則) of Act No. 39 of 2025, the Act on Punishment of Organized Crimes and Control of Proceeds of Crime (組織的犯罪処罰法, Act No. 136 of 1999) as it stood before the amendments Article 23 of that Act made to it that come into effect on the date set in Article 1, item (iii) of those supplementary provisions.
記録命令付差押え
In Article 2 of the supplementary provisions (附則) of Act No. 39 of 2025, a seizure with a recording order as defined in Article 99-2 of the Code of Criminal Procedure as it stood before the item (iii) amendments of that Act (第三号改正前刑事訴訟法); where an order for such a seizure was made under that Code, the Juveniles Act or the other laws the article names, as they stood before those amendments, before the date they come into effect, the earlier rules go on applying to the seizure.
第三号改正前刑事訴訟法第九十九条の二に規定する記録命令付差押え
The Penal Code as it stood before Article 2 of the 2022 Act amending the Penal Code and other laws (刑法等の一部を改正する法律, Act No. 67 of 2022) amended it.
In the supplementary provisions (附則) of Act No. 99 of 1987, the Labor Standards Act as it stood before that Act amended it.
The date Act No. 61 of 2011, the amending Act these supplementary provisions (附則) belong to, comes into effect.
This Act as amended by Act No. 23 of 2014.
Short name, used in the supplementary provisions (附則) of Act No. 28 of 2023, for the Special Criminal Act Attendant upon the Enforcement of the "Agreement Regarding the Status of United Nations Forces in Japan" (Act No. 151 of 1954).
Short name, used in the supplementary provisions (附則) of Act No. 28 of 2023, for the Special Criminal Act Attendant upon the Enforcement of the Protocol on the Exercise of Criminal Jurisdiction over United Nations Forces in Japan (Act No. 265 of 1953).
Short name, used in the supplementary provisions (附則) of Act No. 28 of 2023, for the Special Criminal Act Attendant upon the Enforcement of the "Agreement under Article VI of the Treaty of Mutual Cooperation and Security between Japan and the United States of America regarding Facilities and Areas and the Status of United States Armed Forces in Japan" (Act No. 138 of 1952).
弁護人等
Defense counsel, or someone about to become defense counsel at the request of a person entitled to appoint one (a non-lawyer only after court permission under Article 31(2) of the Code of Criminal Procedure).
Short name for the Act Partially Amending the Civil Code, etc. (Act No. 45 of 2026).