Since FUJIWARA no Motonari, Hidehira's father-in-law and political adviser, was a son of Naganari ICHIJO's cousin, it is probable that he (Yoshitsune) depended on that connection.
秀衡の舅で政治顧問であった藤原基成は一条長成の従兄弟の子で、その伝をたどった可能性が高い。