Sugamo's Mothers.

Directed by Nobuo Adachi and starring Aiko Mimasu as a mother who lost three of her four sons to war. Aki is an elderly mother who has lost three of her sons to war. She is happy to be reunited with her youngest son, who has been demobilized from the South, only to find him imprisoned in Sugamo Prison as a suspected war criminal. The mother wishes only to be reunited with her son, but she falls ill from overwork and heartache...