Chi no wadachi (2014)

In this police drama the focus is on two policemen in Tokyo. There is the regular police department and there is internal affairs with its investigative powers of the police. One tends to regular detective work. The other's mission is overseeing the police department from within the system. Two cops were close like brothers, sweat and worked together. They become separated and alienated one day, each ending up working in a different department. In Tokyo a corpse is found one day. The dead man was formerly a cop.