The MOJ's correctional agencies may be subsumed according to their purposes under seven categories: Prisons, juvenile reform schools, juvenile correctional high schools, training institutes, detention centers, juvenile detention houses and drug abuser treatment centers.
Established for executing criminal sentences against convicted persons
2. Training institutes
Established for holding prisoners who have been sentenced to mandatory work programs (such as for offenders of habitual larceny) or to disciplinary programs (such as for gangsters)
3. Juvenile reform schools
Established for holding juveniles who have been sentenced by a juvenile court to reformatory education
4. Juvenile correctional high Schools
Established for providing school education to juveniles who have been sentenced to prison terms, detention, or correctional punishment
5. Detention centers
Established for holding criminal suspects during investigation and defendants pending trial
6. Juvenile detention houses
Established for holding juveniles under the age of 18 who are being investigated by a juvenile court or who have been charged with a crime that is under investigation or in trial.
7. Drug abuser treatment centers
Established for holding drug users and helping them do away with the addiction through phased treatment.