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Kaizen Ryu is a family-friendly karate club offering traditional and sport karate in East London and Essex. Established in April 2001, the club welcomes people of all backgrounds from age five and describes itself as a multicultural community focused on building skills, friendships, discipline, and health. Its instructors are fully vetted, qualified, and insured, and the chief instructor has 29 years of martial arts training experience and continues to train in Japan.

The club teaches Goju Ryu karate at multiple dojos, serving areas including Hackney, Bethnal Green, Bow, Ilford, and Dagenham. Programs include beginner classes, general karate training, advanced sessions for brown and black belts, and open squad training for members pursuing competition. Kaizen Ryu also organizes events, seminars, grading tests, and tournament opportunities, including national and international competitions. The club is linked with the Goju Ryu Karate Do Seiwakai network, which supports instructor development. Prospective students can book a free trial class. Monthly classes are listed at £35, while senior-grade training and open squad sessions are £10 per class.