It is said that, in addition, the fact that the officials had to hold additional posts of departments due to the shortage of capable government officials in Onmyoryo helped the Kamo clan, whose talent and position had been well recognized, to monopolize the principal departments of the Onmyoryo all at once.
加えて、陰陽寮官人の人材不足による複数部門の兼務、という実態も相まって、才能・地位を認められた賀茂氏は一気に陰陽寮の主要部門をすべて独占することになったといわれている。