What's funny also is that not even Sony Japan was relevant for PS3 success. Thank Naughty and Santa Monica.
I don't know about Nintendo but their most prominent studio is in the West, Retro studio.
As for MS, I heard MS Osaka got something to reveal at TGS. I hope is a genuine and an excellent Japanese game.
Also my dream is that MS acquire Platinum Games their wild imagination would be perfect with MS pocket.