This article explores the history and current situation of juvenile detention centers in Japan, including the pros and cons of the Japanese juvenile justice system. It is based on a philosophy of rehabilitation rather than punishment and focuses on providing guidance and support to young offenders so that they can learn from their mistakes and become productive members of society. There are approximately 70 juvenile detention centers across Japan with around 4500 inmates aged between 14-18 years old at any given time, however this number has been decreasing due to changes made to the system which emphasize diversionary measures such as probation rather than incarceration. The article also addresses some common questions about juvenile justice in Japan.