His father was killed by the Sue Camp, Yoshitaka OUCHI killed himself, and then Yoshitoyo was caught by the Sue Camp and killed himself (Daineiji no hen; the revolt of Daineiji).
父を陶軍に殺害され、良豊も大内義隆自害後に陶軍に捕われて自害して果てた（大寧寺の変）。