She was a descendant of FUJIWARA no Kanesuke of FUJIWARA no Yoshikado line of the Northern House of the Fujiwara clan, and a daughter of Shinano no kuni no kami (Governor of Shinano Province) FUJIWARA no Koretsuna.
藤原北家藤原良門流・藤原兼輔の後裔で、信濃国守藤原伊綱の娘。