HAJ
| Acronym | Definition |
|---|---|
| HAJ | Hokkaido Arbeit Johosha (Japanese publishing company) |
| HAJ | Hanover, Germany - Langenhagen (Airport Code) |
| HAJ | Honor and Justice (MMORPG Utopia alliance) |
| HAJ | Himalayan Association of Japan (mountaineering) |
| HAJ | Housing Authority of Joliet (Joliet, IL) |
| HAJ | Hobby Association of Japan |