Sensei Hassell began his study of the history and philosophy of martial arts in general (and karate-do in particular) while majoring in English Literature at Washington University in St. Louis.
In November 2000, Sensei Hassell received honors from many national, state, and local dignitaries in recognition of his 40 years of dedication to Shotokan karate.
In addition to teaching at the ASKA Headquarters Dojo and at various YMCAs and school districts in the St. Louis, Missouri, metro area, Sensei Hassell oversaw the instruction and administration of thousands of students nationwide in ASKA and AJKA affiliated clubs, and traveled extensively, teaching, lecturing, and officiating.
As of March 2006, Sensei Hassell had published more than 100 articles in numerous periodicals around the world, and more than 28 books including:
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