Toki clan
Kōdai-in was born Sugihara Yasuko in Owari Province between 1541 and 1549. She was the second daughter of , a descendant of Taira no Sadamori, and his wife . She was adopted by her uncle Asano Nagakatsu, a descendant of the Toki clan and of Minamoto no Yorimitsu (944-1021). According to the "Hankanpu" (Genealogy of the Protectors of the Shogunate), she was first supposed to marry Maeda Toshiie, but she became the wife of Hideyoshi.