White paper on crime 2012 Part2/Chapter5/Section5/1
Volunteer probation officers can be assigned to any one of 886 probation districts (as of April 1, 2012) nationwide where they engage in rehabilitation services that include implementation of probation/parole supervision and crime prevention activities, etc.
Fig. 2-5-5-1 shows the number of volunteer probation officers, female rate, and their average age over the last 30 years. The Volunteer Probation Officer Act (Act No. 204 of 1950) stipulates that the number of volunteer probation officers shall not exceed 52,500. As of January 1, 2012, the number of volunteer probation officers was 48,221 (Source: The Rehabilitation Bureau, Ministry of Justice).