Allegheny Shotokan is home to the only Pittsburgh Sport Karate World Champions. Â Team Kumite, coached by Bill Viola, Â is the only NBL World Champion’s in the Pittsburgh Region. Â 3x World Champion Ali Viola, 3x World Champion Terrence Tubio, World Champion Jose Rivera, and World Champion Dominic Leader. Â The all-star team represents the Irwin / North Huntingdon area and the entire City of Pittsburgh at regional, national and international martial arts karate tournaments, championships and competitions. Â You can see the team in action at the Kumite Classic held at the Monroeville Convention Center.