Karate has become a competition sport, and has spread worldwide, though its roots are still alive, and this video is an excellent example of this. Shihan Toshihiro Oshiro, native of Okinawa, is a recognized authority on the history and techniques of traditional Okinawan martial arts. He is president of the Ryukyu Bujutsu Kenkyu Doyukai (RBKD), which dedicates its work to the research and development of Okinawan Karate and Kobujutsu technique, and in particular the teaching of Shima-Ha Shorin-Ryu Karate and Yamanni-Ryu Kobujutsu. The style bases its work on understanding body biomechanics and internal dynamic physical system through the old kata, defending the traditional way of practicing Karate as a unitary system, as opposed to actual sport Karate.