Well... At least it's posting the required specs...
Min Required: P3 800Mhz, 128megs RAM, & a Gefore card w/ 32megs of mem. (They don't specifiy what kind.)
Recommended: P4 (no speed listed), 256 megs of RAM & a GeForce 3 or 4 Ti with at least 64megs of mem.
It looks like they are recommending the GeForce4 Ti4200 as the card to use. (I can't really read japanese, but I can get the gist of it.)
Besides, if anyone DID import it, they'd have to connect to the Japanese servers. That'd make a lot of problems in terms of connection speed...