- QUALL
- Quantum
- Quantum(パソコン)
- quatix
- quattro arte
- QUIETPOINT
- Quiksilver
- Quintokuta
- Quolice
- QXシリーズ
- QZT
- R.A.T
- Rab
- RABLISS
- radiant
- RADIO EVA
- radius
- Raffaello
- RafiCaro
- RAGEBLUE
- RAIDMAX
- RAIJINTEK
- Rainbow（TOYOTOMI）
- RAINS
- RAKU
- RAM MOUNTS
- RAMMAX
- RANGERS
- RAPTIC
- RAPTOR
- RAT FINK
- RATOM
- RAVAcoco
- Ravensburger
- Raver
- Ravia
- RAVIJOUR
- RAWR
- Ray BEAMS
- ray-out