noun
juvenile classification home; juvenile detention facility
A facility where juveniles are held and assessed before a family court decision. The term is specific to the Japanese legal system.
少年鑑別所では、家庭裁判所の決定まで少年を収容する。
At a juvenile classification home, juveniles are held until the family court makes a decision.
少年院 is a juvenile reformatory where juveniles are sent after a court decision for correctional education, while 少年鑑別所 is a temporary detention and assessment facility before the court decision.
Compound of 少年 (juvenile), 鑑別 (classification, assessment), and 所 (place, facility). The term is a direct description of the facility's function.