Furthermore, in the late Heian period, Daigaku-ryo became unable to function because the Kanshi Ukeoi system (the system that allows the succession of governmental posts by heredity) was introduced, and government positions were monopolized by people from distinguished families (because the nobility abused the Oni system, through which descendents of higher rank officials were given preference when assuming a post).
更に平安時代末期には、官司請負制の導入や官吏（官僚）が門閥で占められるようになって（貴族による蔭位の制の濫用）その機能を果たさなくなった。