- CONCORDE（ortofon）
- Confis
- CONFU
- connect
- Constellation（Seagate）
- contex
- Contour
- Contour Design
- Contour Mouse
- control freak
- Coolean
- COOLPIX L
- COOLTAI
- COOPO JAPAN
- CORBY
- CORES
- CORPUS
- CORSAIR
- CORVETTE
- COSBEAUTY JAPAN
- COSBEAUTY JAPAN アクリアルピーリング
- cosmonature
- COSORI
- COSYONALL
- Cote&Ciel
- covia
- covia FLEAZ
- COWAY
- Cowin
- Cowon
- Cowon iAUDIO
- Cowon PLENUE
- CRAFT
- CRAFT STANDARD BOUTIQUE
- cramp
- Crane
- CREATOR
- Creator（MSI）
- CREATURE
- Creek