ブーゲンビル島沖海戦
On 7 May 1942, she participated in the Battle of the Coral Sea, moving on to the Solomon Islands where she took part in the Battle of the Eastern Solomons on 24 August 1942, the evacuation from Guadalcanal at the end of January 1943. "Haguro" took light damage in the Battle of Empress Augusta Bay on 2 November 1943. On 19 June 1944, she survived the Battle of the Philippine Sea, and from 23–25 October 1944 she took light damage in the Battle of Leyte Gulf.