Mistwalker isn't first party, but the games they made for MS were backed fully by MS moneyhats. They are sort of like David Jaffe's new company, receiving backing from a company, but not owned by it.
Microsoft has gotten plenty of Japanese-oriented content, but the Japanese market is moving more and more toward handhelds, save for the ace in the deck Wii. The HD consoles are slipping into oblivion, day-by-day. MGS4 has a lot of weight on it's shoulders in the coming weeks.
Threads of Interest:
The Movie Thread: http://www.vgchartz.com/forum/thread.php?id=6880
The Crow Eating Thread: http://www.vgchartz.com/forum/thread.php?start=0&id=3886
The Betting Thread: http://www.vgchartz.com/forum/thread.php?start=0&id=7104
Custom GIFs Thread: http://www.vgchartz.com/forum/thread.php?id=18963
The Greatest Game Ever Conceived On Any Platform
Tag: "I have tasted Obi-Wan's bitter tears"