Under Hideyoshi, Motochika and his son Chōsokabe Nobuchika participated in the invasion of neighboring Kyūshū, in which Nobuchika died.
Hideyoshin alaisuudessa Motochika ja hänen poikansa Chōsokabe Nobuchika osallistuivat Kyūshūn valloitukseen, jonka aikana Nobuchika menehtyi.