- J Salmon Ltd
- J. Grancher
- J.K. Rowling's Wizarding World
- J4G
- j5create
- JAB
- Jabra
- Jabra B2B
- Jactalea
- JADA
- Jagwire
- Jakks Pacific
- Jaleco
- JAM
- Jam Audio
- Jamara
- James Bond
- Jamo
- Janod
- Janome
- JANTEX
- Jardimeca
- Jargar
- Jarre
- Jarre Technologies
- JASHEN
- Jata
- Jaybird
- JAYC0
- Jaym
- JB systeme
- JB Systems
- JBC
- Jbl
- Jbl By Harman
- JCOTTON
- JDR Editions
- Jean
- Jean Claude Olivier
- JEAN DUBOST
- Jean Louis David
- Jean-Claude Olivier
- Jean-Louis David
- Jeep
- Jepssen
- JERIKO SOFT
- Jeujura
- Jeux Famille
- Jeux FK
- Jeux opla
- JEUX reconditionnés
- Jeux Teens
- Jeux Vidéos
- JFGA
- Jim Charlier
- Jim Dunlop
- Jimveo
- Jisson
- JJRC
- JK IMAGING COMPANY
- JLab
- JMlab
- JNOD
- JOAL
- Joby
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- John
- John Adams
- John Doe
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- Johns Hopkins University Press
- Johntoy
- JOHO
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- JOKER SRL
- Joligrace
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- Jonsbo
- JOOLA
- Jools
- Joseph Joseph
- Joseph Maeser
- Jouceo
- Jouetprive
- JOUS
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- Jovis Verlag
- Jowood
- JoWooD Production
- JOYEUSE
- Joyor
- JQ
- JRA
- JSPH
- JU
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- Julbo
- Julian Bowen
- JUMBO
- Jumbo Spiele
- Jungle Speed
- Juniper
- Juniper Networks
- Jupiter
- Jura
- JUSFG
- Just Flight
- Just For Games
- JUST FOR GAMES MAXIMUM Ent.
- JustForGames
- Jvc
- JXFA
- Jyamma Games
