Final Fantasy Union: "After the achievement list was leaked via a Japanese site and Square Enix were very coy about it last month, Final Fantasy XIII was finally confirmed for an Xbox 360 release in Japan. However, the whole thing just seems like it will leave a bitter taste in the mouths of consumers.
Sure, as Square Enix claim, there probably are some people in Japan who only have an Xbox 360 and really want to play Final Fantasy XIII. But considering how successful JRPGs have been in Japan so far, it's hard to believe that there was a significant demand from Japanese gamers for Square Enix to release the title.
I don't remember seeing Final Fantasy XIII on Xbox 360 anywhere in Famitsu's weekly lists of "Japan's Most Wanted", the same lists that had The Last Remnant on PS3 featured heavily - that title never emerged though and stayed Xbox 360 exclusive despite lots of consumer demand."