- Quiksilver
- Quintokuta
- Quolice
- R.A.T
- Rab
- RABLISS
- radiant
- RADIO EVA
- radius
- Raffaello
- RAGEBLUE
- RAIDMAX
- RAIJINTEK
- Rainbow（TOYOTOMI）
- RAINS
- RAKU
- RAM MOUNTS
- RAMMAX
- RANGERS
- RAPTIC
- RAPTOR
- RAT FINK
- RATOM
- RAVAcoco
- Ravensburger
- Raver
- Ravia
- RAVIJOUR
- RAWR
- ray-out
- ray-out カーブ
- raynox
- RAYQUAL
- raytrek
- Razer
- razr 5G
- RCA
- RCF(パソコン)
- Re・De
- Re:EDIT