Kurogane

Kurogane (黒鋼, "Black Steel") is one of Syaoran's companions in Tsubasa: RESERVoir CHRoNiCLE. He is a ninja from feudal Japan (Nihon), he sports a black outfit (which is part of the reason why Fai D. Fluorite calls him "Mr. Black", additionally the first character of his name means "black") and he carries around a katana named "Ginryū" (銀竜, "Ginryū"? meaning "Silver Dragon").