i assume this is because Japan is becoming a Niche market as games will sell much more if targetted at the western audiences, and they become a hit

anyway, gametrailers has some video of the game in progress, and aside from the artistic spin, the gameplay looks to be almost identical. there seems to be a way to still do the overheard view or something.
click here and scroll down to the gameplay section, which should be at the bottom.
the electric guitar-heavy music reminds me of Lords of Thunder.