The name is long waves. Naganami was a Yugumo-class destroyer. Fujinagata at Osaka laid her down on 5 April 1941, launched her on 5 March 1942, and commissioned her on 30 June 1942. Captain Tsutae Kumabe had her from that day.
On 30 November 1942 she was Rear Admiral Raizo Tanaka's flagship at Tassafaronga. Eight destroyers were on the supply run. Takanami was out in front, then Oyashio, Kuroshio, Kagero, Makinami, Naganami, Kawakaze, and Suzukaze. American gunfire sank Takanami. Japanese torpedoes, not pinned to one destroyer, blew the bows off Minneapolis and New Orleans, hit Pensacola, and sank Northampton. Naganami was not sunk.
On the night of 1–2 November 1943 she was with the light cruiser Agano off Empress Augusta Bay, and with Hatsukaze and Wakatsuki. Rear Admiral Morikazu Osugi's flag was in Agano, not in her. She was not sunk. Hatsukaze lost her bow in a collision with Myoko, and American destroyers finished that destroyer. Not one ship is credited. The cruisers sank Sendai. That fire is not credited to one ship.
Carrier aircraft sank her in Ormoc Bay on 11 November 1944. Not one plane is credited. Wakatsuki was lost in that bay the same day, also to carrier aircraft, and not to one plane. Naganami was struck on 10 January 1945.