Frequently Asked Questions

Is there a book about Dux Ryu Ninjitsu that I can use if I want to train?

Aside from the autobiography of Shidoshi Dux, The Secret Man, there is no literature available for Dux Ryu Ninjitsu. The style is taught from father to son, from sensei to student, in the tradition of the Koga Yamabushi Ninjitsu system originating hundreds of years ago in Japan.

Where can I find a dojo if I am interested in training in Dux Ryu Ninjitsu?

Dux Ryu dojos are only found in Washington and California in the United States of America. In Calfiornia, Dux Ryu Ninjitsu is taught at the University of Southern California as a martial arts class and club.  Other schools are listed below:


    Shidoshi David Silverman
    20620 Lassen St, Los Angeles, CA 91311


    Shihan Michael Cairns
    239 SW 152nd St.
    Seattle, Washington 98166

How can I get in touch with Shidoshi Dux if I have a question?

Shidoshi Dux does not have an email address or contact information about himself to the public at this time, but he may have one in the future.  We can forward your questions to him if you visit our messageboard at, Shidoshi Dux's personal site.  Thank you.

How can I visit a class to see what Dux Ryu Ninjitsu is like?

Dux Ryu classes are held every Monday and Wednesday in the PHED building of USC (University of Southern California)  in downtown Los Angeles, from 8-10 pm on Mondays and Wednesdays.

You can also e-mail for information about classes in the valley.

What is training in Dux Ryu Ninjitsu like?

Training focuses on stand up sparring, ground grappling, weaponry, defensive and offensive techniques and conditioning.

Please email if you have any questions about Dux Ryu Ninjitsu.  Please know that your messages are not directly sent to Sensei David Silverman or Hanshi Dux, but are actually sent to the USC Dux Ryu Ninjitsu Club.  Therefore, your questions and comments will be answered by Sensei David Silverman's more experienced students, most of the time.  Questions and comments sent for Hanshi Dux and/or Sensei David Silverman are usually forwarded to them.   A reply to your email from them depends on their schedule, since they are very busy.  If you do send in any questions or comments for either of these two, please address that to us so that we know it is sent for them.  Thank you.

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