| Abbreviation | Definition |
|---|---|
| IKF | International Karate Federation |
| IKK | I Know Karate |
| IKKU | International Karate Kobudo Union |
| IKKU | Irish Kenpo Karate Union |
| IKL | International Karate League |
| IKO | International Karate Organisation |
| IKO | International Karate Organization |
| IOGKF | International Okinawan Goju-ryu Karate Federation |
| ISKA | International Shotokan Karate Association |
| JIKC | Japanese International Karate Center |
| JKA | Japan Karate Association |
| JKAI | Japan Karate Association Of India |
| JKF | Japan KARATE-DO Federation |
| JKK | Josiah Kenpo Karate |
| JKO | Japan Karate Do Organization |
| JKO | Japan Karate-do Organization |
| JKR | Japan Karate-do Ryobu-kai |
| JSK | Japan Shotokan Karate |
| JSKA | Japan Shotokan Karate Association |
| K | Karate |