Kenpo Go Shin Jitsu School of Karate is a practical self-defense martial arts school located in Hayward, California. Kenpo Go Shin Jitsu School of Karate teaches Chinese Kenpo, Gung-Fu, boxing, Judo, Jujitsu, Escrima, Tai Chi, Qi Gong, Lua, and massage. Owner and instructor, Grand Master John Masculine is President of the United Self Defense Organization, and a 10th-degree black belt with over 35 years of experience. John implements natural body motion with reflexes and quick action, in his self-defensive and offensive methods against single, multiple, armed, and unarmed attackers. Simulated attacks in standing, sitting, and ground positions using padded attackers are used in teaching methods. New members receive one week of free training, as well as a free uniform with minimum sign-up.