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Aikido Jo

Shidoshi Frank Dux is a master of the Koga Yamabushi Ninjutsu, Ninjitsu school. A secret ninja art which he learned from his mentor Sensei Senzo Tanaka. In this book Frank Dux explains everything about the history of his martial arts style.

Sensei David Richardson was a long time student of Shidoshi Frank Dux and ha a 3rd degrse black belt in DRN Dux Ryu Ninjitsu. Frank Dux had made many claims over the years according his achievements and Koga Yamabushi Ninjutsu and his teacher Shidoshi Senzo Tanaka. In this video from the old Teemax site of David Richardson you see Richardsons opinion on the controversy about Dux.