There are over a million Japanese/part-Japanese people in the US alone.  Also keep in mind they probably aren't selling more than a few thousand max.

http://www.uffsite.net/news/288/final-fantasy-xiii-imports-the-best-this-generation.html

Import Preorders for Final Fantasy XIII are "the best this generation" according to an employee of Import specialists Play-Asia speaking to UFFSite.

The employee, who wished to remain anonymous, told us that Final Fantasy XIII has "far outdone the other big Japanese releases this year."

"We saw a lot of imports for Bayonetta too - especially after Famitsu's score - but over the last few weeks FF13 has gone on to outdo that significantly."

Bayonetta is out in less than a month, which goes a long way to explain why less people would preorder that - but our source goes on to insist that FF13 has outdone every other title since the release of the PS3 and Xbox 360. The Japanese release is region free, making it easy for Western players to play.

Final Fantasy XIII is out in Japan in around two weeks and is out in the West in March. If the waiting for you is too much you can add to FF13's Import success by putting down an Import Preorder.

Stick with us at UFFSite for our import review of FF13 - but in the meantime, why not check out our FF13 Product Guide and sign up to our RSS Feed and Twitter for the latest FF news!

Not that surprising given how anticipated this game is but I assumed that preorders would be slightly watered down since this is the quickest localization of a FF game ever. The fact that PS3 is region free has probably helped the video game import business this gen. I wonder where Demon's Souls ranks this year for imports since the asian version was already in english. Too bad VGC doesn't track imports. FFXIII might have a shot at 2 million first week if those were included.

The Hype train is coming!! :D