His father, Yasunori, later passed on the Rekido (the study of the calendar) of the Onmyodo (way of Ying and Yang; occult divination system based on the Taoist theory of the five elements), which was the teaching of the family, to Mitsuyoshi, and the Tenmondo (ancient horoscopy) to his favorite disciple (or junior disciple), ABE no Seimei, and thus the two main Soke (the head family or house) of Onmyodo, 'Angaryo family' (Abe family and Kamo family) were established.
父・保憲は後に家学であった陰陽道のうち暦道を光栄に、天文道を愛弟子（もしくは弟弟子）の安倍晴明に譲り、ここに陰陽道の二大宗家「安賀両家」が成立する。