Ranar Nasara a kan Japan (wanda aka fi sani da V-J Day, Nasara a Ranar Pacific, ko V-P Day) ita ce ranar da Masarautar Japan ta mika wuya
a yakin duniya na biyu, a zahiri kawo karshen yaki. An yi amfani da kalmar ga duka ranakun da aka sanar da sanarwar farko game da mika wuya na Japan <unk> 15 ga Agusta, 1945, a Japan, kuma saboda bambancin yankin lokaci, 14 ga Agusta, 1945 (lokacin da aka sanar da shi a Amurka da sauran Amurka da tsibirin gabashin Pacific) <unk> har zuwa 2 ga Satumba, 1945, lokacin da aka sanya hannu kan takardar mika wuya, a hukumance ya kawo karshen yakin duniya na biyu.