Frank Dux

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Frank W. Dux
Style Ninjitsu
Teacher(s) Senzo Tanaka

Frank W. Dux (pronounced "dukes") is a martial artist and fight choreographer. Dux established his own school of Ninjutsu in 1975, called "Dux Ryu Ninjutsu". An article about his purported exploits, which appeared in Black Belt Magazine in 1980, was the eventual inspiration for the 1988 film Bloodsport starring Jean-Claude Van Damme.[1][2]

Martial arts career[edit]

Dux states that he was introduced to and trained in Koga Yamabushi Ninjitsu by Senzo Tanaka.[3] Dux's martial art style, Dux Ryu Ninjitsu, is not a koryu (15th century feudal form of Ninjutsu), but is still claimed to be "based on its Koga Ninja root principles of adaptability and consistent change".[3] Frank Dux formulated the proprietary augmentation technology he calls DUX FASST (Focus-Action-Skill-Strategy-Tactics).

The accuracy of many of Dux's personal claims have been disputed, including his martial arts background, fighting in the "Kumite", and prior military service. According to the Los Angeles Times, the organization that allegedly staged the Kumite had the same address as Dux's house, and the trophy he claims to have won was bought by him at a local trophy store.[4] This was disputed by Dux, who claimed that the receipt was fabricated. He also claims that his critics are part of a conspiracy to discredit him, led by ninjutsu master Stephen K. Hayes, whom Dux claims views him as a threat.[5][6]

In 2012 Sheldon Lettich, co-writer of the film Bloodsport based on Dux's "Kumite" claims, dismissed those claims and others Dux had made as being completely false. [7]


Dux has written a 1996 autobiography entitled The Secret Man: An American Warrior's Uncensored Story. Dux's story was inspiration for the 1988 motion picture, Bloodsport, which he choreographed.[8][9] Jean-Claude Van Damme starred in this motion picture. Dux is also credited as a story co-author for the film The Quest.[10][11]


  • Dux, Frank & Dr. Mark D. Selner. "Unlocking Power: Keys to Success", in Black Belt, September 1980 Volume 18 #9, 46-50:58.
  • Dux, Frank. "Self Defense Against Knives", in Black Belt, October 1980 V.18 #10, 30-34.
  • Dux, Frank. The Secret Man: An American Warrior's Uncensored Story (ReganBooks, 1996) ISBN 0-06-039152-9 and ISBN 978-0-06-039152-2
  • Dux, Frank & Gordon F. Richiusa. "The Guide to Ninjutsu Knife Fighting", in Inside Kung Fu Presents: The Complete Guide to Ninja Training, July 1987: 76-79.


  1. ^ Richards, David (1994-09-04). "FILM; Jean-Claude Van Damme, the, uh, Actor?". The New York Times. Retrieved 2010-08-08. 
  2. ^
  3. ^ a b Mendel, Bob (May 1981). "Can Ninjitsu Make You the Ultimate Warrior". Kick Illustrated: 47–49. 
  4. ^ Johnson, John (May 1, 1988). "NINJA: Hero or Master Fake? Others Kick Holes in Fabled Past of Woodland Hills Martial Arts Teacher". Los Angeles Times. Retrieved 2007-05-17. 
  5. ^ "Full Mental Jacket" (August 1996) and "Stolen Valor: Profiles of a Phony-Hunter" (November 1998) Soldier of Fortune
  6. ^ Ralph Keyes, The post-truth era: dishonesty and deception in contemporary life (New York: St. Martin's Press 2004) p. 73 ISBN 0-312-30648-2
  7. ^
  8. ^ Stewart,, John (November 1980). "Kumite: A Learning Experience". Black Belt: 28–34, 91. 
  9. ^ Carter, Dave (May 1987). "Bloodsport - The Ultimate Martial Arts Movie". Inside Kung Fu Presents the Complete Guide to Ninja Training: 38–47. 
  10. ^ "Van Damme Cleared in Suit Over 'Quest'". The Los Angeles Times. 1998-11-11. Retrieved 2010-08-24. 
  11. ^ Thomas, Kevin (1996-04-26). "A Knockout for Director Van Damme". The Los Angeles Times. Retrieved 2010-08-24. 

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