In 465, he crossed the sea and headed to Korean Peninsula with SOGA no Karako, OTOMO no Katari, and OKAHI no Kusune in order to conquer Silla, but they struggled to defeat those remnants of Shilla soldiers; in the end, OTOMO no Katari died in the battle, while KI no Oyumi died of an illness.
465年、雄略天皇の命で、蘇我韓子、大伴談、小鹿火宿禰らと新羅を征伐するために朝鮮へ渡るが、残兵の抵抗に苦戦し、大伴談が戦死、彼も新羅で病死した。