Ryushinkan Dojo

Dojo Instructors

Martin Katz, 6th Dan

Chief Instructor, Ryushinkan Dojo

National and International Teaching Committee Member

Martin Katz Sensei began his Aikido training in 1974 at the San Diego Sheriffs' Aikikai under John Damian Sensei. He joined the Aikido Association of American with Shihan Fumio Toyoda in 1990. Katz Sensei has taught children and adults since 1978 employing an eternal enthusiasm combined with a theatrically innovative style. His philosophy is born out of his love of the art and his reverence of all the teachers and students that have shared the path.

Katz Sensei's Philosophy

A philosophy of education that rings true to me: to hear is to forget, to see is to remember, to do is to understand. When practicing Ukemi (taking falls), as in all aikido, one learns by doing or being done to, as some might say "when being on the receiving end of the art". The importance of ukemi — besides the obvious necessity of self preservation — is to understand the art from the inside out, or maybe the upside down. It is vital for a student to learn to follow the flow of the movement before they can lead the movement. Confidence naturally develops by being able to accept ki (energy) from the nage (thrower). A physical memory is developed and a spiritual growth happens when "the fear of falling is replaced with the joy of flying."

Please listen to this audio interview with Martin Katz recorded in 2018 by David Drexler.   http://thearchivechannel.com/audio-memoirs/  

Assistant Instructors

The assistant instructors at Ryushinkan Dojo are Fukushindoin, qualified instructors of aikido who are trained and certified through the Aikido Association of America.

Siu-Wai Wu


Wu Sensei began his aikido training at UC Santa Barbara with Steve Ota Sensei in 1990. He joined Ryushinkan Dojo in 1996 and received his Shodan in 2004. He currently holds the rank of 4th degree black belt (Yondan).

Tom Groot

Executive Director

Groot Sensei began training at Ryushinkan Dojo under Martin Katz Sensei in 1993 and currently holds the rank of 4th degree black belt. He also holds 4th Dan rank in Muso Jikiden Eishin Ryu iaido.

Edeline Fotheringham


Edeline Sensei started training at Ikeda Shihan's dojo in Boulder Colorado in 1998. She has enjoyed Katz Sensei's teaching and training as well as the Ryushinkan community since 2016. She currently holds the rank of 3rd degree black belt (Sandan).

Mike Reaves


Reaves Sensei began aikido with Ryushinkan Dojo in 2001 and received his 3rd degree (Sandan) rank in 2016. 

Maiko Kasuya


Maiko Kasuya started aikido in Japan when she was nine years old. She joined Ryushinkan Dojo in 2002 and received her 3rd degree black belt in 2023.

Edward Lai


Edward Lai began his aikido training at Ryushinkan Dojo under Martin Katz Sensei in 2004 and currently holds the rank of 2nd-degree black belt (Nidan). He also holds 1st Dan rank in Muso Jikiden Eishin Ryu iaido.