Sanetaka's wife was a daughter of Norihide KAJUJI and her sisters included a beloved maid of the Emperor Gotsuchimikado and Fujiko KAJUJI who was nyogo (a high-rank maid) of the Emperor Gokashiwabara and the mother of Emperor Gonara and, therefore, Sanetaka had a strong relation with the Imperial Family.
また、妻は勧修寺教秀の娘だが、妻の姉妹には、後土御門天皇の寵妃や、後柏原天皇女御で後奈良天皇生母の勧修寺藤子などがおり、天皇家とは濃い縁戚関係にあった。