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Juveniles Act

少年法(しょうねんほう)

Chapter III Juvenile Criminal Cases (Articles 47 to 60)

The law as Act on the Arrangement of Related Acts upon the Enforcement of the Act Partially Amending the Civil Code, etc. (Act No. 46 of 2026) leaves it, with the words it changes marked.

The main text is read a page at a time: a chapter to a page, and a long chapter in runs of articles. The whole main text, and the supplementary provisions and appended tables this amendment changes. Those it leaves untouched are on the page for the text in force.

How the changes are shown

Underlined: words the amendment adds. A bar: where it removes words.Underlined: words the amendment adds. Struck through: the words it removes.Underlined: words the amendment adds. Struck through: the words it removes.

Article 47第四十七条

Suspension of Statute of Limitations(時効の停止)
Article 47, paragraph (1)

The statute of limitations for prosecution is suspended during the period from the date on which the ruling prescribed in Article 21 is given on the case prescribed in the first sentence of Article 8, paragraph (1), or from the date on which the case prescribed in the second sentence of Article 8, paragraph (1) was referred to a family court, to the date on which the ruling to subject disposition for rehabilitation of an adjudicated delinquent becomes final and binding.

第八条第一項前段の場合においては第二十一条の決定があつてから、第八条第一項後段の場合においては送致を受けてから、保護処分の決定が確定するまで、公訴の時効は、その進行を停止する。

Article 47, paragraph (2)

The provisions of the preceding paragraph apply to cases in which the juvenile has reached 20 years of age, after the ruling or referral prescribed in Article 21.

前項の規定は、第二十一条の決定又は送致の後、本人が満二十歳に達した事件についても、これを適用する。

Article 48第四十八条

Detention(勾留)
Article 48, paragraph (1)

A detention warrant may not be issued against a juvenile unless it is unavoidable.

勾留状は、やむを得ない場合でなければ、少年に対して、これを発することはできない。

Article 48, paragraph (2)

If a juvenile is detained, then the juvenile may be detained in a juvenile classification home.

少年を勾留する場合には、少年鑑別所にこれを拘禁することができる。

Article 48, paragraph (3)

The provisions of the preceding paragraph remain applicable even after the juvenile reaches 20 years of age.

本人が満二十歳に達した後でも、引き続き前項の規定によることができる。

Article 49第四十九条

Separate Treatment(取扱いの分離)
Article 49, paragraph (1)

A juvenile suspect or defendant must be separated from other suspects or defendants to avoid contact with them as much as possible.

少年の被疑者又は被告人は、他の被疑者又は被告人と分離して、なるべく、その接触を避けなければならない。

Article 49, paragraph (2)

The proceedings against the juvenile defendant must be separated, even if related to other defendant cases, as long as the proceedings are not obstructed.

少年に対する被告事件は、他の被告事件と関連する場合にも、審理に妨げない限り、その手続を分離しなければならない。

Article 49, paragraph (3)

At a penal institution, detention facility or coast guard detention facility, a juvenile, (other than a sentenced person as prescribed in Article 2, item (iv) of the Act on Penal Detention Facilities and the Treatment of Inmates and Detainees (Act No. 50 of 2005) (excluding any person with the status of detainee awaiting a judicial decision as prescribed in item (vii) of that Article)), must be detained separately from persons of 20 years of age or older.

刑事施設、留置施設及び海上保安留置施設においては、少年(刑事収容施設及び被収容者等の処遇に関する法律(平成十七年法律第五十号)第二条第四号の受刑者(同条第七号の未決拘禁者としての地位を有するものを除く。)を除く。)を二十歳以上の者と分離して収容しなければならない。

Article 50第五十条

Proceedings Policy(審理の方針)
Article 50, paragraph (1)

The proceedings of a juvenile criminal case must be conducted in compliance with the purport of Article 9.

少年に対する刑事事件の審理は、第九条の趣旨に従つて、これを行わなければならない。

Section 3 Dispositions第三節 処分

Article 51第五十一条

Mitigation of Death Penalty and Imprisonment for Life(死刑と無期拘禁刑の緩和)
Article 51, paragraph (1)

If a person is under 18 years of age when the crime was committed, then they will be sentenced to imprisonment for life, if the punishment would otherwise be the death penalty.

罪を犯すとき十八歳に満たない者に対しては、死刑をもつて処断すべきときは、無期拘禁刑を科する。

Article 51, paragraph (2)

If a person is under 18 years of age when the crime was committed, they may be sentenced to imprisonment for a fixed term, if the punishment would otherwise be imprisonment for life. In this case, the punishment will be a sentence of 10 years or more to no more than 20 years.

罪を犯すとき十八歳に満たない者に対しては、無期拘禁刑をもつて処断すべきときであつても、有期拘禁刑を科することができる。この場合において、その刑は、十年以上二十年以下において言い渡す。

Article 52第五十二条

Indeterminate Sentences(不定期刑)
Article 52, paragraph (1)

If a juvenile is to be sentenced to imprisonment for a fixed term, a sentence for the maximum term of imprisonment is determined within the range of the punishment to be imposed, with the minimum term of imprisonment being at least one-half of the maximum term of imprisonment (if the maximum term of imprisonment is less than 10 years; 5 years less than the maximum term of imprisonment; this also applies in the following paragraph). In this case, the maximum term of imprisonment may not exceed 15 years, and the minimum term of imprisonment may not exceed 10 years.

少年に対して有期拘禁刑をもつて処断すべきときは、処断すべき刑の範囲内において、長期を定めるとともに、長期の二分の一(長期が十年を下回るときは、長期から五年を減じた期間。次項において同じ。)を下回らない範囲内において短期を定めて、これを言い渡す。この場合において、長期は十五年、短期は十年を超えることはできない。

Article 52, paragraph (2)

Notwithstanding the provisions of the preceding paragraph, if it is found particularly necessary, taking into consideration the possibility of improvement and rehabilitation of the juvenile and other circumstances, the minimum term of imprisonment prescribed in that paragraph may be determined within not less than one-half of the minimum term of imprisonment of the punishment to be imposed, and not less than one-half of the maximum term of imprisonment. In this case, the provisions of Article 14, paragraph (2) of the Penal Code apply mutatis mutandis.

前項の短期については、同項の規定にかかわらず、少年の改善更生の可能性その他の事情を考慮し特に必要があるときは、処断すべき刑の短期の二分の一を下回らず、かつ、長期の二分の一を下回らない範囲内において、これを定めることができる。この場合においては、刑法第十四条第二項の規定を準用する。

Article 52, paragraph (3)

The provisions of the preceding two paragraphs do not apply in the case when suspension of execution of sentence is rendered.

刑の執行猶予の言渡しをする場合には、前二項の規定は、これを適用しない。

Article 53第五十三条

Number of Days of Detention at a Juvenile Classification Home(少年鑑別所収容中の日数)
Article 53, paragraph (1)

When the measures prescribed in Article 17, paragraph (1), item (ii) are implemented, the number of days of detention at a juvenile classification home is deemed as the number of days of pre-sentencing detention.

第十七条第一項第二号の措置がとられた場合においては、少年鑑別所に収容中の日数は、これを未決勾留の日数とみなす。

Article 54第五十四条

Prohibition on Disposition in Lieu of Punishment(換刑処分の禁止)
Article 54, paragraph (1)

No juvenile is to be sentenced to detention in a workhouse.

少年に対しては、労役場留置の言渡をしない。

Article 55第五十五条

Transfer to a Family Court(家庭裁判所への移送)
Article 55, paragraph (1)

A court, by a ruling, must transfer a case to a family court if it finds it appropriate to subject the juvenile defendant to disposition for rehabilitation of an adjudicated delinquent as a result of an examination of the facts.

裁判所は、事実審理の結果、少年の被告人を保護処分に付するのが相当であると認めるときは、決定をもつて、事件を家庭裁判所に移送しなければならない。

Article 56第五十六条

Execution of Imprisonment(拘禁刑の執行)
Article 56, paragraph (1)

Regarding a juvenile sentenced to imprisonment (excluding a person serving their sentence at a juvenile training school pursuant to the provisions of paragraph (3)), the sentence is executed in a specially established penal institution or a specially partitioned area in a penal institution or detention facility.

拘禁刑の言渡しを受けた少年(第三項の規定により少年院において刑の執行を受ける者を除く。)に対しては、特に設けた刑事施設又は刑事施設若しくは留置施設内の特に分界を設けた場所において、その刑を執行する。

Article 56, paragraph (2)

The execution pursuant to the provisions of the preceding paragraph may be continued until the juvenile in question reaches 26 years of age.

本人が二十六歳に達するまでは、前項の規定による執行を継続することができる。

Article 56, paragraph (3)

Notwithstanding the provisions in Article 12, paragraph (2) of the Penal Code, a juvenile under 16 years of age sentenced to imprisonment may serve their sentence at a juvenile training school until they reach 16 years of age. In this case, correctional education is given to the juvenile.

拘禁刑の言渡しを受けた十六歳に満たない少年に対しては、刑法第十二条第二項の規定にかかわらず、十六歳に達するまでの間、少年院において、その刑を執行することができる。この場合において、その少年には、矯正教育を授ける。

Article 57第五十七条

Execution of Sentence and Disposition for Rehabilitation of an Adjudicated Delinquent(刑の執行と保護処分)
Article 57, paragraph (1)

If a sentence of imprisonment or penal detention becomes final and binding in the course of the disposition for rehabilitation of an adjudicated delinquent, the sentence is executed first. The same applies if a sentence of imprisonment or penal detention has become final and binding and the disposition for rehabilitation of an adjudicated delinquent is made before the sentence is executed.

保護処分の継続中、拘禁刑又は拘留の刑が確定したときは、先に刑を執行する。拘禁刑又は拘留の刑が確定してその執行前保護処分がなされたときも、同様である。

Article 58第五十八条

Parole(仮釈放)
Article 58, paragraph (1)

A person sentenced to imprisonment as a juvenile may be paroled after the following periods have passed:

少年のとき拘禁刑の言渡しを受けた者については、次の期間を経過した後、仮釈放をすることができる。

Article 58, paragraph (1), item (i)

seven years in the case of imprisonment for life;

無期拘禁刑については七年

Article 58, paragraph (1), item (ii)

one-third of a term of sentence in the case of imprisonment for a fixed term rendered pursuant to the provisions of Article 51, paragraph (2);

第五十一条第二項の規定により言い渡した有期拘禁刑については、その刑期の三分の一

Article 58, paragraph (1), item (iii)

one-third of a minimum imprisonment term in the case of imprisonment rendered pursuant to the provisions of Article 52, paragraph (1), or pursuant to the provisions of paragraphs (1) and (2) of that Article.

第五十二条第一項又は同条第一項及び第二項の規定により言い渡した拘禁刑については、その短期の三分の一

Article 58, paragraph (2)

The provisions of item (i) of the preceding paragraph do not apply to a person sentenced to imprisonment for life pursuant to the provisions of Article 51, paragraph (1).

第五十一条第一項の規定により無期拘禁刑の言渡しを受けた者については、前項第一号の規定は適用しない。

Article 59第五十九条

Termination of the Parole Period(仮釈放期間の終了)
Article 59, paragraph (1)

If a person who has been sentenced to imprisonment for life as a juvenile has been paroled, and ten years have passed without revocation of the parole, then the person is deemed to have served their full sentence.

少年のとき無期拘禁刑の言渡しを受けた者が、仮釈放後、その処分を取り消されないで十年を経過したときは、刑の執行を受け終わつたものとする。

Article 59, paragraph (2)

If a person who has been sentenced to imprisonment for a fixed term as a juvenile, pursuant to the provisions of Article 51, paragraph (2), or pursuant to the provisions of Article 52, paragraph (1) or paragraphs (1) and (2) of that Article, has been paroled, and, without revocation of the parole, a period equal to the period during which the person served the sentence before being paroled, or the term of sentence prescribed in Article 51, paragraph (2) or the maximum term of imprisonment prescribed in Article 52, paragraph (1), has passed, then the person is deemed to have served their full sentence at whichever of those times comes first.

少年のとき第五十一条第二項又は第五十二条第一項若しくは同条第一項及び第二項の規定により有期拘禁刑の言渡しを受けた者が、仮釈放後、その処分を取り消されないで仮釈放前に刑の執行を受けた期間と同一の期間又は第五十一条第二項の刑期若しくは第五十二条第一項の長期を経過したときは、そのいずれか早い時期において、刑の執行を受け終わつたものとする。

Article 60第六十条

Application of Laws and Regulations Concerning Personal Qualification(人の資格に関する法令の適用)
Article 60, paragraph (1)

With respect to application of laws and regulations regarding personal qualification, a person who had been sentenced for an offense committed as a juvenile and has served their sentence or who has been exempted from execution of the sentence is deemed not to have been sentenced from that point on.

少年のとき犯した罪により刑に処せられてその執行を受け終り、又は執行の免除を受けた者は、人の資格に関する法令の適用については、将来に向つて刑の言渡を受けなかつたものとみなす。

Article 60, paragraph (2)

When a person has been sentenced for an offense committed as a juvenile, but the execution of the sentence has been suspended, the person is deemed to have served their sentence during that suspension period, and the provisions of the preceding paragraph apply.

少年のとき犯した罪について刑に処せられた者で刑の執行猶予の言渡を受けた者は、その猶予期間中、刑の執行を受け終つたものとみなして、前項の規定を適用する。

Article 60, paragraph (3)

In the case of the preceding paragraph, if the suspension of execution of the sentence is revoked, the person is deemed to have been sentenced when it is revoked, with respect to the application of laws and regulations regarding personal qualifications.

前項の場合において、刑の執行猶予の言渡を取り消されたときは、人の資格に関する法令の適用については、その取り消されたとき、刑の言渡があつたものとみなす。

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