When he was assigned as Onmyo no kami in 1055, it was established that the positions of Reki hakase and Tenmon hakase were to be passed down by succession within the Kamo and the Abe clans, respectively.
1055年に陰陽頭就任した際、賀茂氏に暦博士を、阿倍氏に天文博士を代々独占世襲させることと定めている。