Mochizuki was a Mutsuki-class destroyer of the Imperial Japanese Navy. Captain Ryokichi Sugama commanded her from 15 December 1938 until he was relieved on 15 October 1940. Captain Saburo Terauchi succeeded him that day and remained in command until 6 April 1942.
On 11 December 1941, with Terauchi still captain, she was with the attack force at Wake Island and is not recorded as hit. She was with the force again for the landing on 23 December.
At the Battle of Kula Gulf on 6 July 1943 she was in the first transport group and landed her troops. On the way out, Nicholas and Radford fired on her. Accounts disagree on whether she was hit.
Captain Goro Iwabuchi took command on 15 October 1943. On 24 October, American aircraft sank Mochizuki east of New Britain. Iwabuchi was in command when she was lost.
