The name means the seventh month in the old calendar. Fumizuki was a Mutsuki-class destroyer. The Fujinagata yard in Osaka laid her down on 20 October 1924, launched her on 16 February 1926 and completed her on 3 July 1926 as Destroyer No. 29. She received her name on 1 August 1928.
At Pearl Harbor she was in Destroyer Division 22 of Destroyer Squadron 5, and sailed from Mako for the Philippine landings at Lingayen and Aparri. In early 1942 she escorted convoys for Malaya and Java and then, from 10 March, escorted troop convoys from Singapore to Penang and Rangoon. On 16 September 1942 she collided with the transport Kachidoki Maru in the Formosa Strait and was heavily damaged. Repairs at Sasebo lasted into early 1943.
She escorted the seaplane tender Kamikawa Maru to the Shortlands at the end of January 1943 and covered the Guadalcanal evacuation. From February she was with the Eighth Fleet on Tokyo Express runs, and she was damaged by strafing at Finschhafen in March and at Kavieng in April. From September to January 1944 she evacuated troops from Kolombangara and Vella Lavella and landed troops at Buka, Bougainville and New Guinea. At Rabaul on 2 November 1943 strafing killed six of her crew. Another raid damaged her near Kavieng on 4 January 1944.
At Truk on 17 February 1944, during Operation Hailstone, a near miss from a Grumman Avenger on her port side amidships disabled her one usable turbine and caused flooding the crew could not stop. She sank on 18 February with 29 crew killed. She was struck from the Navy List on 31 March 1944.
Sources: Allyn Nevitt's combinedfleet.com Tabular Record of Movement for IJN Fumizuki; Wikipedia, Japanese destroyer Fumizuki, rewritten here.