Because he didn't have any biological children, he adopted Hideaki KOBAYAKAWA, who was the fifth son of Iesada KINOSHITA who had been adopted by Hideyoshi TOYOTOMI, and transferred the head of the family.
実子はなく、木下家定の五男で豊臣秀吉の養子となっていた小早川秀秋を養子として迎え、家督を譲っている。