Under this system, the Retired Emperors, Imperial families and court nobles were given certain official posts every year, invited applicants for the posts in question and recommended one of the applicants to the post in return for the payment of ninryo (fee for getting official post).
太上天皇をはじめ皇族、公卿に対して毎年、一定の官職を給与し、給与を受けた者が任官希望者を募り、任料を納めさせる代わりに希望者を申任させる制度である。