Yu~ki (born August 8, 1971) is a Japanese musician best known as the bassist of visual kei rock band Malice Mizer from its inception in 1992 to its "indefinite hiatus" in 2001. After his previous band Ze:ro disbanded in 1992, he was approached by Mana and Közi to be their new bassist; after listening to a demo tape of their music, he agreed, and the core of Malice Mizer was formed.