コロンバンガラ島沖海戦
He commanded a destroyer squadron, DesRon2 from his flagship "Jintsu" during the Battle of Kolombangara against the Royal New Zealand Navy and the United States Navy on July 12, 1943. Although the battle was a victory for Japan, "Jintsu" was hit repeatedly by gunfire and torpedoes, destroying its bridge and killing Isaki.