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2023 Fiscal Year Final Research Report

Comprehensive Study on "New Treatment" for Older Juveniles and Young Adults

Research Project

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Project/Area Number 20H01433
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 05050:Criminal law-related
Research InstitutionKyushu University

Principal Investigator

Takeuchi Kenji  九州大学, 法学研究院, 教授 (10325540)

Co-Investigator(Kenkyū-buntansha) 高橋 有紀  福島大学, 行政政策学類, 准教授 (00732471)
大谷 彬矩  信州大学, 先鋭領域融合研究群社会基盤研究所, 助教(特定雇用) (00801622)
服部 朗  愛知学院大学, 法学部, 教授 (40267886)
森久 智江  立命館大学, 法学部, 教授 (40507969)
本庄 武  一橋大学, 大学院法学研究科, 教授 (60345444)
相澤 育郎  立正大学, 法学部, 専任講師 (90715393)
Project Period (FY) 2020-04-01 – 2024-03-31
Keywords少年法 / 特定少年 / 青年層 / 若年成人 / 犯情 / 収容継続 / 保護処分 / 刑事処分
Outline of Final Research Achievements

This study identifies (1)the legal system's treatment of older juveniles and young adults in the US, UK, Germany, France and Australia and the dynamic direction of their criminal policy and criminological factors and (2) theoretical and practical issues in the period before and after the establishment of the “Tokutei-shonen” (specific juvenile) system in Japan.
All comparator countries have legal systems that provide special treatment for young adults, distinguishing them from adults of other age groups. Even if not institutionalised, they have de facto flexible measures for individualisation. This trend has intensified in recent years, backed by findings from desistance study and neurosciences. It can be seen that in Japan, the lack of a legal concept in criminal justice that captures the characteristics of young people and the lack of application of provisions for continued detention in juvenile training schools have influenced various decisions in specific juvenile cases.

Free Research Field

刑事政策

Academic Significance and Societal Importance of the Research Achievements

少年法適用年齢の上限となる年齢の問題は、洋の東西を問わず、歴史的にみて、少年法の理論、立法、実務において大きな争点となってきた。本研究が確認した、比較対象国の法制度や事実上の措置、刑事政策の動的な方向性、それを支える理論や知見は、今後の日本の法制度や刑事政策のあり方や方向性を考える上で重要な基盤となる。また、日本の特定少年制度創設前後の時期における学理上、実務上の懸念や課題の提示は、今後の制度のあり方を検証するための重要な基礎となる。特定少年制度は、再犯防止施策とも関係しており、本研究は今後の法理論や刑事政策の展開にも重要な示唆を与えうる。

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Published: 2025-01-30  

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