Nightmare (ナイトメア, Naitomea) is a Japanese visual kei rock band from Sendai. Formed on January 1, 2000, it has consisted of Yomi (lead vocals), Sakito (lead guitar & backing vocals), Hitsugi (rhythm guitar), Ni~ya (bass & backing vocals) and Ruka (drums & percussion) for the majority of their career. They enjoyed mainstream success with the inclusion of their songs "The World" and "Alumina" in the Death Note anime and are considered a major act in the visual kei scene.