| JanTuts | Developer | |
| Jan_rl | Developer | |
| Jana Games Studios | Developer | |
| Jana V. | Developer | |
| JanaChumi | Developer | |
| Janaprasanth | Developer | |
| JandDgames | Developer | |
| Jandre | Developer | |
| JanduSoft | DeveloperPublisher | |
| Jane disembiggen Ditchfield | Developer | |
| Jane Richardson | Developer | |
| Jane Titor | Developer | |
| Jane's Combat Simulations | DeveloperPublisher | |
| Jang Games | Developer | |
| Jangma | Developer | |
| JangoMango | Developer | |
| JangoUni | Developer | |
| Jangosan | Developer | |
| Jani Nykänen | Developer | |
| JaniToad | Developer | |
| Janine | Developer | |
| Janis | DeveloperPublisher | |
| Jank Hambrams | Developer | |
| Jankenteam | Developer | |
| JankyBread | Developer | |
| Jannik Boysen | Developer | |
| JanoGames | Developer | |
| Janos Biro | Developer | |
| Janz4400 | Developer | |
| Jaoel | Developer | |
| JapaSsou | Developer | |
| Japan Art Media | Developer | |
| Japan Art Media (JAM) | Developer | |
| Japan Clary Business | Publisher | |
| Japan Home Video | DeveloperPublisher | |
| Japan Media Programming | Developer | |
| Japan Studio | Developer | |
| Japan System House | Developer | |
| Japan System Supply | DeveloperPublisher | |
| Japan System SupplyJP | Publisher | |
| Japan Vistec | DeveloperPublisher | |
| Japanese Media Programming | Developer | |
| Japanese Softbank | Publisher | |
| JapaneseMEOW | Developer | |
| Japes610 | Developer | |
| Jappa | Developer | |
| Jappa Studios | Developer | |
| Jaqmarti | Developer | |
| Jarbaje | Developer | |
| Jardel Antunes | Developer | |