| Abbreviation | Definition |
|---|---|
| JMLA | Journal of the Medical Library Association |
| JMRA | Japan Marine Recreation Association |
| JNA | Japan Nailist Association |
| JNA | Japan Nut Association |
| JNFA | Japan Nordic Fitness Association |
| JNMA | Journal of Nepal Medical Association |
| JNMA | Journal of the National Medical Association |
| JNPA | Jefferson National Parks Association |
| JOA | Japanese Orthopedic Association |
| JOGA | Japan Organic Germanium Association |
| JOLDTS | Junior Officer Leadership Development and Training Seminar (Reserve Officer Association) |
| JONA | Join Our Natural Association |
| JOPA | Jenison Orchestra Parents Association |
| JORA | Japan Organics Recycling Association |
| JPA | Juvenile Protective Association |
| JPBA | Japan Professional Bowling Association |
| JPCA | Japan Primary Care Association |
| JPCA | Juniper Park Civic Association |
| JPCA | Justices of the Peace and Constables Association |
| JPDA | Japan Package Design Association |