In November of 1489 on the old calendar, his father Sadatoshi, who took part in the Second Rebellion of Jiro MORI and was attacked by the Toyotoki YAMANA's army, committed suicide with Masazane YAMANA.
延徳元年（1489年）11月(旧暦)、第2次毛利次郎の乱に参加した父・定利が山名豊時の軍勢に攻められ山名政実らと自刃した。