After the Heian period, as ritualization's growing in the Imperial Court, the management of annual events that took place in every season such as Sechie (seasonal court banquets) and jimoku (appointment ceremonies) began to occupy the most of the government affairs, at the same time, consultation such as Jin no sadame (ancient cabinet council) and suit began to be integrated into it.
平安時代以後、朝廷のおける儀式化が進み、朝廷における節会や除目などの四季折々に行われる年中行事の運営が朝廷における政務の主たる部分を占めるようになっていき、それに、陣定などの評定や訴訟が組み合わせられていった。