What year was the Kodokan school and dojo opened ?
During his time with the college , Durbin has stated that he studied various other forms of martial arts ( while being unable to cite any third party sources ) including ; Shotokan Karate , Isshin - ryu , Goju Ryu , Shorin - ryu , Aikikai Aikido , Ninjutsu , Tae Kwon Do , Hapkido , and T'ai chi ch'uan .