How to Join the JKA The application procedure differs slightly depending on which kind of membership you are applying for. Click below for information and action steps for each: Group Membership Application Procedures For any dojo, karate group, karate club or other such organization desiring official membership and/or affiliation with the JKA, or for any dojo or club wishing to teach the JKA karate system. Individual Membership Application Procedures For anyone interested in joining the JKA as an individual, and attending one of our dojo or affiliated organizations near them.