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Weston Simonis

  • San Dan Black Belt American Street Jujitsu

  • 3rd Degree Black Belt Kajukenbo

  • Blue Belt Gracie Jiu-Jitsu

  • 4 kyu Green Belt Kodenkan Danzan Ryu Jujitsu

  • Yonkyu Blue Belt Combat Jujitsu

  • Filipino Combatives Affiliate instructor 

  • San Kyu Aikido

  • Certified Personal Trainer ASFA

  • Martial Arts Fitness Instructor

Sifu Weston Simonis is ahead of the self-defense art  American Street Jujitsu.  Weston Simonis's martial arts training started back in 1995.  With many years of training in multiple martial arts, Weston Simonis took his love for the arts and created this website to help people from around the world to be able to learn self-defense from their location no matter where they live.  Not everyone has the opportunity to train in a nice dojo due to the location of their town or country so why not bring the training to you.  


Shannon Spahan

  • 6th Degree Black Kajukenbo Wan Hop Kuen Do

  • 4th Dan Black Belt Filipino Combatives

  • Black Belt Armado Arnis 

  • American street Jujitsu Affiliate Instructor

Sifu Shannon Spahan is the head instructor of the Filipino Combatives at Backyard Jujitsu and affiliate instructor of American Street Jujitsu in the Portland Oregon area.  Sifu Shannon Spahan has a very wide extended background in martial arts and started training with his father at an early age.  Sifu Shannon Spahan has joined Backyard Jujitsu to help teach self-defense arts to people from around the world. 


S Kai Li


Aloha e Mālama Pono 


Professor Kai Li is a lifelong student of the martial and healing arts. He grew up in Hawai’i training in traditional and mixed martial arts of Judo & Jujitsu as well as Kajukenbo Kenpo and competed in several combat sports including boxing, wrestling, and full-contact kickboxing.


Li studied Hawaiian Lua warrior and healing arts and was fortunate to be part of Bishop Museum’s Native Hawaiian Culture & Arts Program’s very first graduating class. 


From these Hawaiian roots he lived, trained, competed, and traveled all over in an effort to study various martial arts and combat sciences within the context of their original geographical and cultural environment.


Professor Li is unique in having worked his way up from white to black or the equivalent in each of the martial arts that Kajukenbo was comprised of.  As a Professor in both Kodenkan Danzan Ryu Judo-Jujitsu and Kajukenbo- Kenpo he is well suited to serve as an advisor and teacher for our Backyard Jujitsu program.


Li is grateful to the teachers, classmates, teammates, opponents, students and friends who have trained him and for the opportunity to share some of that experience with you and our Ohana.


Mahalo Nui Loa Iā ‘Oe



Keith Owen

  • 4th Degree Black Belt Gracie Jiu-Jitsu

  • 3rd Black Blet Jun Fan Gung Fu 

  • Black Belt Kenpo

Professor Keith Owen is ahead of the Team Rhino Gracie Jiu-Jitsu and teache's Jiu-Jitsu through his affiliates worldwide.  Professor Kieth Owen earned his black belt under 8th degree Gracie Jiu-Jitsu Black Belt Master Pedro Sauer.   His Jiu-jitsu school is located in Meridan Idaho.  Click Keith's Picture to find out more about him.


Ron Jennings

  • Kudan Black Belt Danzan Ryu Jujitsu

  • Shodan Kodokan Judo

Professor Ron Jennings Ph.D is a Kudan, 9th Degree Black Belt in Kodenkan Danzanryu Jujitsu with the Kaidensho title of Hanshi (teacher of teachers). He began his martial career in 1958 with boxing and wrestling then started Danzanryu in 1962. He had the good fortune to train and study with many great Judo, Jujitsu and Kempo masters over the next many years, including: Bud Estes, Wally Jay and Sig Kufferath. He opened his first dojo 1968 and has been a school head ever since, adding 27 Black Belts to his lineage.. Ron formally established the Kaishinkai Yudanshakai as a national DZR entity in 2010 with dojos in Oregon Washington, Chicago, and Wyoming. Well known as a cane master and Jujitsu coach, Ron has taught at conventions and seminars from Boston to Hawaii. Nearly retired his students now pass along the DZR traditions to the new students. He still serves as mentor and advisor and is active serving on the Standards Commitee of the American Jujitsu Institute, hombu of the late Master H.S. Okazaki..

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