Kebiishi took more and more official duties from other authorities such as Gyobusho (Ministry of Justice) who was responsible for the judiciary branch, Danjodai (Board of Censors) who was responsible for police and inspections, Kyoshiki (Capital Bureau) who controlled administrative security and other judiciary branches related to the capital, and exercised enormous power.
司法を担当していた刑部省、警察・監察を担当していた弾正台、都に関わる行政・治安・司法を統括していた京職等の他の官庁の職掌を段々と奪うようになり、検非違使は大きな権力を振るうようになった。