9th Degree Black Belt





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International Recognition

USA-Unified International Taekwon-Do under Grand Master Karstadt's guidance keeps General Choi's teachings alive and as true to it's original form as was intended by General Choi Hong Hi. International Recognition and Certification for Degree Rank from First Dan through Ninth Dan, Examiner certification for International Ranks (4th Degree) and above and Umpires class A, B and C are afforded to our members as appropriate. 

World Class Education

As an associate of USA-Unified TKD, you have priority access to the resources both domestically and internationally with International Recognition and Certification and a quality assurance process to protect the integrity and prestige of such qualifications. The USA-Unified TKD sanctioned seminars, workshops and courses not only work towards ensuring such quality but attracts members in a friendly, non-confrontational, non-political environment.  Engagement is ongoing and support in your personal development is offered at a pace you can meter.  Your progression in Taekwon-Do, whether it be at the cutting-edge elite or as a casual practitioner, is yours to control.  Assistance with your school in fitness and personal training regimens along with marketing and administration are also offered as a professional service. 

How Your Membership is Valued

USA-Unified TKD invites anyone with a genuine desire to learn (and teach) true Taekwon-Do as laid down by General Choi Hong Hi to join.  With the fracturing of Taekwon-Do as presented by various interest, the real fear is the erosion of Taekwon-Do in it's purest form.  Since the General passed away in 2002, the emphasis for Master Karstadt and USA-UNIFIED TAEKWON-DO is on maintaining the Purity of the General's Taekwon-Do.  This legacy is utmost and USA-Unified TKD has many Masters and Instructors to guide and educate anyone interested of the core teachings and values of Taekwon-Do.  You as a member become an integral part of this very important legacy.  The skills, values and experience you stand to gain are world class and you in turn become a valued proponent of the True Art of Taekwon-Do. 


Grand Master David W Karstadt was born in 1958, Phoenix, Arizona USA.  He began training in the martial arts at the age of 17 under the instruction of Grand Master Choi, Sun Duk.

He first opened the doors of Arizona International Taekwon-Do in May, 1986.  Since then, Grand Master Karstadt and his staff have been changing peoples lives with their unique style of teaching and personal attention to the development of their students physical and mental strengths.  Master Karstadt has personally trained more than 12,000 students and promoted over 400 students in the USA and Mexico to the respected level of Black Belt.  

Grand Master Karstadt has coached the USA Team 1995 to present and has produced many World Champions including his two sons Master Johnny Karstadt and Joe Karstadt.  His knowledge and skill in the art are unsurpassed.  Master Karstadt’s forty plus years of training, teaching and wisdom are known and respected worldwide.

The Karstadt Taekwon-Do training academy located in Phoenix, AZ is a state of the art facility, providing a safe, clean and friendly atmosphere.   The ITF curriculum taught is the very best available.  Our instructors and staff are the very best.

Grand Master Karstadt works with masters, instructors and schools in the United States to preserve General Choi's legacy and maintain the integrity of  traditional Taekwon-Do. 

Grand Master David Karstadt

is an Official Member of the