Kumiai Ryu Martial Arts System Dubbo – Martial Arts System of Self Defence. Real Karate, Muay Thai, Grappling, Kung-Fu Weaponry and Tai Ki Ken. Fully NCAS Accredited Instructors. Karate grades are recognised in Okinawa. Muay Tai Instructors have trained in Thailand. You never stop learning Martial Arts. Martial Arts is a continuous progression.