| Acronym | Definition |
|---|
| SAJ | Ski Association of Japan |
| SAJ | Stepfamily Association of Japan (est. 2001) |
| SAJ | Society for the Advancement of Judaism |
| SAJ | Shipbuilders' Association of Japan (est. 1947) |
| SAJ | Service de l'Aide à la Jeunesse (French) |
| SAJ | Service des Affaires Juridiques (French: Department of Legal Affairs) |
| SAJ | Soundscape Association of Japan |
| SAJ | Scout Association of Japan (Tokyo, Japan) |
| SAJ | Straight-Ahead Jazz (music genre) |
| SAJ | Syarikat Air Johor Holdings Sdn Bhd (Malaysia) |
| SAJ | Service Animation Jeunes (French: Youth Animation Services) |