Her father, Toshimitsu SAITO, was a member of the prestigious Saito clan (who held the position of deputy military governor of Mino Province) and was a key vassal of Mitsuhide AKECHI, and indeed was referred to as Mitsuhide's nephew (but was actually his cousin); her mother, An INABA was the daughter of Yoshimichi INABA.
父は美濃国の名族斎藤氏（美濃国守護代）の一族で明智光秀の重臣であり甥（実際には従弟）とも言われる斎藤利三で、母は稲葉良通の娘・稲葉あん。