土佐国
After his father Chōsokabe Kanetsugu was attacked by local lords and he killed himself in the Okō Castle in 1508, Kunichika was raised by the aristocrat Ichijō Fusaie in Tosa Province.　Kunichika gave his third son Kōsokabe Chikayasu for adoption to the Kōsokabe Clan in 1558. He reconciled with the Motoya clan and gathered strength.