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if you go by market value: MSFT wins by a LARGE margin.
MFST: 265.5 billion usd
NIntendo Company: 3.9 trillion yen = about 41 billion usd
Sony corporation: 3.44 trillion yen = 36.8 billion usd.

edit: if you go by marketcap. 

msft is the second largest company in the world after exxon mobile. even though there a like 3 or 4 companies that make more profit then msft. 

source: http://www.google.com/finance/stockscreener#c0=MarketCap&c1=PE&c2=DividendYield&c3=Price52WeekPercChange&region=us&sector=AllSectors&sort=MarketCap&sortOrder=1