The brave lion (1974)

During Japan's invasion of China in World War II, two disgraced Japanese soldiers are given a second chance. Facing execution for various infractions, the two men are offered a reprieve if they take a special assignment. Since they can speak Chinese and know the territory, the men are assigned to the task of running a Chinese labor camp the Japanese operate in occupied territory. After the men take over, they work the prisoner's so hard the labor force rises up in revolt of their treatment.