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Challenge Okinawa: Karate Seminars and Events in Okinawa. We create, host and deliver martial arts events in Okinawa specialising in organising unique opportunities for martial artists and tourists coming to these beautiful and historic islands. Whether a solo traveller or a large organisation please do not hesitate to contact us to discuss your goals. We have conceived and delivered seminars inChallenge Okinawa: Karate Seminars and Events in Okinawa. We create, host and deliver martial arts events in Okinawa specialising in organising unique opportunities for martial artists and tourists coming to these beautiful and historic islands. Whether a solo traveller or a large organisation please do not hesitate to contact us to discuss your goals. We have conceived and delivered seminars in