Well, there is no other result to be had out of Japan. Given the relatively weak sales of all home consoles after the PS2, even the mighty Wii (something that should have appealed greatly to Japan with it's motion controls and incredibly small size), it's obvious that Japan has been moving away from home consoles for over a decade and a half, now. Unless your system is also portable, you don't have much of a chance there.
Still, I'm sure Sony is fine with selling 8M-9M there, which is still 7M-8M more than the Series will sell. Their move towards powerful home consoles has them selling bucket loads in all other countries.