The Ritsuryo law established the Shokudo (penalty charges which was paid with copper coins) system to impose punishment and for collection of penal fines, but later the Ritsuryo law enforcement power revoked, resulting in less strict penal punishments.
律令法において罰金を課する贖銅制度が存在していたが、律令法が衰退して刑罰が緩やかになった。