"The Home of Authentic Okinawan Karate." Okinawa Shorinji-Ryu Karate. Chief Instructor: Mehmet S. Tekbas, Renshi. Canadian Director, Okinawa Shorinji-Ryu Karate. Sensei Tekbas has been training for over 45 years in Okinawan Karate. He is the author of the well-received "This is Okinawan Karate," available on Amazon. Sensei Tekbas is also the founding chief instructor of the University of Windsor Karate Club, in 1975.