Also, during the Heian period the administration of library was taken over to the institutions such as Gosho-dokoro (an office to maintain books in the Imperial Court), Uchi no goshodokoro(the place that keeps Emperor's books), Ippon-goshodokoro and so on and lost substance.
また図書の管理も平安時代には御書所・内御書所・一本御書所などの機関に実権を奪われ形骸化した。