Kaiser Arts (覇王流(はおうりゅう) / カイザーアーツ Haō ryu / Kaizā Ātsu, lit. Hegemon-style) is a school of close-combat martial art first introduced in ViVid. It is passed down among the descendants of Claus Ingvalt, an ancient Hegemon of Shutra, from the Ancient Belkan era to modern ages.