Yunagi was a destroyer of the Kamikaze class in the Imperial Japanese Navy. Masao Yamashita was her captain from 30 September 1940 until he was relieved on 15 April 1942.
In December 1941 she was with the Gilberts invasion on 8, 9, and 10 December, and with the second landing at Wake Island on 23 December. She was not in the bombardment of 11 December.
At the Battle of Savo Island on 9 August 1942, Yunagi was the last ship in the column. During that night she dropped back from her place in the line.
After dropping back she traded shots with the already crippled Jarvis. Neither ship was sunk in that pass, and Yunagi was still afloat when the night ended.
Seiichi Okada became captain on 15 April 1942. Masanori Kashima took command on 23 May 1943, and Goro Iwabuchi on 5 November 1943. USS Picuda sank Yunagi on 25 August 1944, north-northeast of Cape Bojeador, Luzon.