Konami Digital Entertainment Inc. is a Japanese developer and publisher of numerous toys, trading cards, anime, tokusatsu, slot machines, arcade cabinets, video games, and additionally operates health and physical fitness clubs in Japan. Konami is famous for popular video game series such as Castlevania, Contra, Dance Dance Revolution, Gradius, Frogger, Suikoden, Ganbare Goemon, Metal Gear, Pro Evolution Soccer, Silent Hill and Yu-Gi-Oh!. See "Konami". Wikipedia. Retrieved 2014-11-12.