[quote name='DarkSageRK']Apparently Japan hated it, so the prices over there have been falling. [/QUOTE]
Opposite of hated it - it sold more in a week than the next-best-selling PS3 game did in a year, so retailers bought a ton more copies, flooding the market. To put this in perspective, over half of the PS3s sold in Japan have a matching copy of FFXIII.