This is a list of Japanese developers that are working on Xbox One. Cave is a surprising name to see. I hope that all of these games will come to PS4 as well as I really don't want to have to get both consoles. The list is taken from Famitsu and translated by Gematsu. I presume the Western companies have Japanese divisions, hence their inclusion.
2K Games
Access Games
Acquire
Arc System Works
Artdink
Atlus
Bandai Namco Games
Bandai Namco Studio
Bethesda Softworks
BusinessPartner
Capcom
Cave
Codemasters
Cute
CyberConnect2
CyberStep
D3 Publisher
Electronic Arts
Experience
From Software
G.rev
Genki
Grounding
GungHo Online Entertainment
Hamster
Integrow
Kadokawa Games
Klon
Konami
Land Ho
Level-5
Mages
Marvelous AQL
Moss
Nippon Ichi Software
Sega
Silicion Studio
SNK Playmore
Spike Chunsoft
Square Enix
Take-Two Interactive
Tango Gameworks
Tecmo Koei
Triangle Service
Ubisoft
Warner Entertainment Japan
Yuke?s
Zoo
2K Games
Access Games
Acquire
Arc System Works
Artdink
Atlus
Bandai Namco Games
Bandai Namco Studio
Bethesda Softworks
BusinessPartner
Capcom
Cave
Codemasters
Cute
CyberConnect2
CyberStep
D3 Publisher
Electronic Arts
Experience
From Software
G.rev
Genki
Grounding
GungHo Online Entertainment
Hamster
Integrow
Kadokawa Games
Klon
Konami
Land Ho
Level-5
Mages
Marvelous AQL
Moss
Nippon Ichi Software
Sega
Silicion Studio
SNK Playmore
Spike Chunsoft
Square Enix
Take-Two Interactive
Tango Gameworks
Tecmo Koei
Triangle Service
Ubisoft
Warner Entertainment Japan
Yuke?s
Zoo
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