Due to mounting criticism of forcing hard labor on prisoners, forced labor was gradually abolished since around 1894, and Shujikan were renamed Kangoku and dissolved to form new facilities after 1903.
収容者に強制労働を強いたことに批判が集まったこと、1894年頃から徐々に強制労働的な受刑者の使役を廃止、1903年以降は監獄と名を改め発展的に消滅した。