So to round up 360's announced JP games...
-Blue Dragon (MGS/MistWalker Studio/Artoon)
-Lost Odyssey (MGS/MistWalker Studio/Feel Plus+)
-Ninety Nine Nights (MGS/Q Entertainment/Phantagram)
-tba (MGS/Game Republic/Cavia)
-Dead or Alive 4 (Tecmo/Team Ninja)
-eNCHANT arM (From Software)
-Frame City Killer (Namco)
...anything else yet? We need Sega Sammy, From Soft, Capcom, Konami, Bandai & Hudson to step up soon. Namco & Tecmo both hopefully have more as well, and if 360's not bc hopefully SNK will start porting their AW wares to it in addition to Xbox 1.
edit-Thanks Mr. ram.