Cape St. George
On the night of 24–25 November 1943, "Ōnami" led a troop transport/evacuation run to Buka Island. In the Battle of Cape St. George, she was torpedoed by the destroyers , and/or , east-southeast of Cape St. George (). "Ōnami" blew up and sank with all hands, including ComDesDiv 31 (Captain Kiyoto Kagawa). Captain Kiyoto Kagawa was posthumously promoted two ranks, one of the few IJN destroyer skippers so honored.