 He began karate training at 13 under his uncle.Matsumura taught him several kata, including Naihanchi Shodan, Naihanchi Nidan, Naihanchi Sandan, Pinan Shodan, Pinan Nidan, Passai Sho, Passai Dai, Chinto, Kusanku, Gojushiho, Sesan, Rohai Jo, Rohai Chu, Rohai Ge, and finally at age 23, Hakutsuru.Soken has said in interviews that Kusanku is the most important kata to the style.