Although there are various theories on when Ingu kyu was established, nenkan for Sannomiya came into existence during the era of Emperor Junna, while nenshaku for the Sannomiya, as well as nenkan and nenshaku for In, had already existed in the Kampyo era after "Kampyo-Goyuikai/Kampyo-no-Goyuikai" (a group of precepts for governing) was established and the retired Emperor Uda mentioned what he thought should be the ingu kyu.
院宮給の成立については諸説あるが、三宮への年官は淳和天皇の頃に成立し、残りの三宮の年爵・院の年官・年爵も宇多上皇が院宮給のありかたについて触れた『寛平御遺誡』が成立した寛平年間には既に存在していた。