She came from the Hino family, which was related to the ruling Ashikaga family of the Muromachi shogunate, and Yoshimasa's birth mother, Shigeko HINO, was Tomiko's grandaunt.
室町幕府の足利将軍家と縁戚関係を持っていた日野家の出身で、義政の生母日野重子は富子の大叔母にあたる。