Hell, no. The JRPGs it has (and it has a lot) don't tend to sell great in Japan. Mostly due to the small userbase.
Hell, the PS3 will only have around 4-5 million sellers in Japan (GT5, FF13, FF Versus 13, X unnanounced game, Y unannounced game)
Short of Final Fantasy XIII somehow becoming a 360 exclusive, no, the 360 will never have a million seller in Japan.







