Kaizen Kan Tucson Kyokushin Karate & Kodokan Judo is a traditional Japanese dojo in Tucson, Arizona. Founded in 2013 by William Schrader, it teaches Kyokushin Karate and Kodokan Judo to adults and children. The dojo’s mission is to cultivate discipline, respect, and perseverance while guiding students in authentic Japanese martial arts training.