I'll go ahead and use Xbox fan logic here:
But the userbase in Japan is too small to recoup any development cost for these games. Expect a PS3 port for the exclusives, and simultaneous release for the multiplats.
On topic:
What is SE really thinking? 360 = 600k, PS3 = 2 million. Why? Look at LO and Blue Dragon. Blue Dragon flopped, and LO super flopped in Japan. I thought that SE was going to try and pay more attention to its' home audience, but I guess not......