This is a low number compared with the USA and the UK, where 760 people per 100,000 inhabitants (2008) and 153 per 100,000 inhabitants (2009) respectively are in jail.
Japan's prisons are strictly regimented with military-style discipline and aim to reform and rehabilitate offenders. Prisoners in Japan wear prison-issue uniforms. There are rules on the correct way to walk, talk, eat, sit and sleep. Punishments are handed out to prisoners who do not follow the rules.