Doing Time (2002)
Original title: 刑務所の中
Doing Time is a 2002 Japanese-language comedy movie directed by Yōichi Sai, with a running time of 1h 33m. It stars Tsutomu Yamazaki, Teruyuki Kagawa and Tomorowo Taguchi.
A man serving a sentence in a minimum-security prison. Life in the jail is rigid and organized, eventually leading all of the cell-mates to abandon their individuality.