Any stories or episodes regarding Yoshimasa were not found; it is assumed that his performance and accomplishments were as great as those of his father or elder brother given that he was appointed to the Onmyo no kami; the top of the Onmyoryo.
父である安倍晴明や兄とされる安倍吉平のように伝説や逸話は見当たらないが、陰陽寮のトップである陰陽頭に任ぜられている事から、実力や実績は父や兄同様に相当なものであったことが伺える。