police cell; detention facility; jail
A facility where police temporarily detain suspects or prisoners, distinct from a prison (刑務所). Often used in legal and news contexts.
The suspect was transferred to the police cell.
留置場での生活は厳しい規則に縛られている。
Life in the detention facility is bound by strict rules.
The police put the suspect in a holding cell.
He was released from the police cell three days later.