On May, 465, he went to Paekche after he heard that his father died of illness in the war waged against Shilla (ancient Korean kingdom) under the order from Emperor Yuryaku, but his high-handed behavior provoked OKAHI no Sukune who took power as Taisho (the general) after Oyumi's death.
465年5月(旧暦)、父が雄略天皇の命を受けての新羅との交戦中に、病死したと聞いて、百済に向かうが、横暴な振る舞いによって小弓の後に大将として権力を握っていた小鹿火宿禰を怒らせてしまう。