How many gaming studios do Ninty, Sony, and MS have individually?

[Globox]

Sony Computer Entertainment Inc.

* Clap Hanz
* Polyphony Digital
* SCE Japan Studio
* Team ICO

SCEI Subsidiary Divisions
Sony Computer Entertainment America Inc.

* Incognito Entertainment
* Naughty Dog
* SCE
* SCE Foster City Studio
* SCE San Diego Studio
* SCE Santa Monica Studio
* Sony Online Entertainment LLC.
* Zipper Interactive

Sony Computer Entertainment Europe Ltd.

* Bigbig Studios
* Evolution Studios
* Guerrilla Games
* SCE London Studio
* SCE Studio Cambridge
* SCE Studio Liverpool

Sony Computer Entertainment Korea Inc.

* SCE Korea – EyeToy: EduKids, GloRace: Phantastic Carnival
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This list is stunning, but we already knew this or i did.
Let's not forget some of second party studios.

Media Molecule - have 3 game contract with SOny, not counting LBP.
Eat Sleep Play - 3 game deal with Sony
High Impact games - make Ratchet for PSP
Sucker Punch - they are next in line to be acquired and if Sony wasn't in situation they are, that would already be happening. MS tried to acquire them couple of years ago they just said thx but no thx. INfamous is their next game. Sly Cooper developer.
There are few more like Insomniac and what not.

Sony has best and largest first party/second party, don't try to spin that otherwise you are either idot or fanboy.