Publisher / Manufacturer
- AOTECH
- AOYAMA RIBON
- Aozora Records
- Apesounds
- APEX
- APEX TOYS
- Apole
- APORO
- Applause Records
- Apple
- apple
- Apple Computer
- APPLE MILK Communications Co., Ltd. & C2L Co., Ltd.
- APPLE ONE
- Aprica
- Apricot blossom
- Aqua Music
- Aqua Plus
- Aquamarine
- aquawave
- Arakawa Internet Godo Kaisha
- Araki Productions
- araree
- Arc System Works
- Arcadia
- ARCLIGHT
- arCONOMi
- Arcs
- ARC国別情勢研究会
- ARDENY
- ARDIE
- AREA
- ARES
- Ares Company
- Argoss
- Ari an Rozu
- ARIA
- Arias
- ARIKA
- Arista Japan
- ariusu
- Arix Japan
- ARM RECORDS:コジマ録音
- Armabianca
- ARMOR-X
- Arms Corporation
- ART ASYLUM
- ART BOMB
- ART BOXインターナショナル
- Art Diver
- Art Model K1
- ART OF WAR
- Art Spirits
- ART STORM
- ART TRAC
- ART UNION
- Art Union
- ART UNION CORPORATION
- ART UNION:REVERVE DEPT
- ART UNION:REVERVE DEPT.
- ART UNION、NEWTOK
- Art Union、U-POP RECORDS
- ART UNION、U-POP RECORDS
- artbeat publishers
- ARTBOXインターナショナル
- ARTDINK
- ARTHOUSE WAGON
- Artio
- Artist Society
- ArtPort
- ARTTRAC
- Artweld
- Aru Kosu Media
- Aru Rio Ne
- ARUZE
- AS Project
- Asa no Ha (By ART SOU CO., LTD.)
- Asahi Denki
- Asahi Electrochemical. Co
- asahi kobo
- ASAHI RESERCH
- Asahi Shimbun Publishing
- Asahi Shimbun Publishing
- Asahi Shimbun Publishing
- Asahi Shimbun Publishing
- Asahi Shimbun Publishing
- Asahi Shimbun Publishing
- Asahi Shimbun Publishing
- Asahi Shimbun Publishing
- Asahi Shimbun Publishing
- Asahi Shimbun Publishing
- ASAP
- ASCII Eiga
- Ascii Mediaworks
- Asean Domestic
- ASIA PRESS INTERNATIONAL
- AsiaGeo
- ASJ
- ASK
- ASK