From 1975 to 1980 Frank Dux fought 329 matches. He retired undefeated as the World Heavy Weight Full Contact Kumite Champion.
Mr. Dux still holds four world records
Subsequently, Mr. Dux founded the first American Ninjitsu System
Dux – Ryu
How many 7 year olds come back to school after a weekend with a photo of an F-16 Fighter Jet with their name on it???