After the late Heian Period, the Imperial Court slowly lost the power to maintain the social order with the police and the military, losing the right to judge criminal cases, thus samurai maintained the order in place of the Imperial Court.
平安時代後期以後、朝廷は社会秩序を維持するための警察・軍事的な裏付け（「検断権」）を次第に失った。