ISOK is a non-profit, democratic international service organization for legitimate black belt practitioners and instructors who practice Okinawan and Japanese karate systems.

Our mandate is to help individual black belts manage their own karate progress and achieve success. We use a modern business model and international standards to interface directly with individual black belts.

ISOK is not a black belt ‘mill’. We assess and award rank based on the international standards of the Dai Nippon Butokukai and the International Martial Arts Federation.

Please see the About ISOK page for more information.