Afterwards, in the early 10th century, when the Kamo clan and the Abe clan began to pass their respective jobs down exclusively by succession, people from these families virtually monopolized the higher positions including Onmyo no kami in Onmyoryo.
後に10世紀に入って、後述の賀茂氏と阿倍氏の2家による独占世襲が見られるようになると、陰陽頭以下、陰陽寮の上位職はこの両家の出身者がほぼ独占するようになった。