Shin-Gahn-Do was developed by Martials Arts instructors that have had real life combat hand to hand experiences. There is a total of 55 yrs of knowledge in its creation. The knowledge comes from many different Martial Arts back grounds. Okinawan Karate, The Five Animals of Shao-Lin-Gung Fu, Judo, Jujutsu, Aikijujitsu, Free stile Wrestling, Mui Tai, Korean Martials, Boxing, along with many different weapons including modern military ones.