American Okinawan Karate Association
- Organization established under Tatsuo Shimabuku, Steve Armstrong, and Harold Mitchum. Resources include history, events, newsletters, membership details, merchandise, and contact information.
- http://www.aoka.org/

Exerkai Isshinryu Karate Association
- List of schools, events and general information. [flash4 needed]
- http://www.exerkai.com

United States Isshinryu Karate Association
- Features dojo etiquette, history, events, links and general information.
- http://www.usika.com

International Isshinryu Karate Association
- Worldwide support for the style. History, instructor profile, news, events, dojo list and registration.
- http://www.iika.com/