徳川綱吉
Her father was Takatsukasa Norihira, who had the post of "sadaijin" and the . Her half-siblings by other mothers included the "kampaku" Takatsukasa Fusasuke, the "sadaijin" Kujō Kaneharu, and Takatsukasa Nobuko, the wife of Tokugawa Tsunayoshi. Another theory holds that Fusako was actually Norihira's younger sister, whom he adopted as his daughter.