DEVELOPERS
- J-Force
- J.P. Room
- J-Wing
- Jaleco
- Jaleco Entertainment
- JAM
- Japan Art Media
- Japan Art Media (JAM)
- Japan Clary Business
- Japan Media Programming
- Japan Media Programming / iNPLAS
- Japan Soft Technology
- Japan System Supply
- Japan Vistec
- Jellyvision
- Jellyvision, Inc
- Jester Interactive
- Johnnds Electronics
- Jorudan
- Joy Van
- Joycast Entertainment Corp.
- Junglevision Software
- Jupiter
- Jupiter Corporation
- Jupiter / Future Creates
- Jupiter Multimedia
- JV Games Inc.