In 1980, long before the ninja craze, Hanshi Frank W. Dux founded the first American system of Ninjitsu--Dux Ninjitsu--later popularly shortened and referred to as Dux Ryu. However, not unlike Myamoto Musashi and all the other great martial arts masters that are relegated to history, Hanshi Dux continued to evolve and later created a truly unique and original system now entitled FASST/Dux Ryu.

While rooted in traditional Koga Yamabushi Ninjitsu and the martial sciences, FASST/Dux Ryu is a new, secret technology created out of Hanshi Dux's legendary, rich, and distinguished empirical experience. Hanshi Dux's experiences are unparalleled and have inevitably transformed him into becoming, without question, one of the most celebrated, recognized, respected, and acclaimed leading combat strategists and tactics authorities in the world today.

Hanshi Dux's empirical and rare first-hand knowledge of real combat forced him to adapt, improvise, improve, and change his fighting not only in order to dominate in his professional no-holds-barred fights but also in his having to overcome real life, lethal threats that he encountered while working as a covert operative evaluating and implementing tactics as a consultant to elite military and police units worldwide.

Hanshi Dux's unique insights and contributions are considered life-saving amongst those charged with neutralizing lethal or combative threats: special forces, private high risk security, HRT, SWAT, Special Operations Command, Black Operations, and law enforcement personnel. Thus, his contributions and the sacrifices he made to prove their worth resulted in his being titled "Knight Chevalier" in the Miami Police Hall of Fame. Notably, Hanshi Dux is named as a source contributor in the creation, evaluation, and implementation of the elite U.S. Navy SEAL Special Warfare Operations Combat CFC Manual (K431-0097).

Hanshi Dux's real life exploits and courage are elaborated upon by notable former covert agent, Iran Contra paymaster, Lieutenant Commander Alexander Martin, U.S. Navy (retired), in the media and, under penalty of perjury, in testimony. Also, former Soviet, Major General Anatoly Korneinko discusses Hanshi Dux's activities in The Secret Man (HarperCollins, 1996), an autobiography that chronicles the life of Hanshi Dux--a modern warrior named "one of America's most lethal covert operatives."