NAJA
| Acronym | Definition |
|---|---|
| NAJA | Native American Journalists Association |
| NAJA | National Association of Jewelry Appraisers |
| NAJA | North American Judo Association (martial arts) |
| NAJA | North Atlantic Jazz Alliance (Fullerton, CA) |
| NAJA | Natal Amateur Judo Association (KwaZulu-Natal, South Africa) |
| NAJA | North American Jujitsu Academy |