SAGExSDX
CAGiversary!
PlayAsia is offering the Japanese version of Battle Fantasia for Xbox 360 for $24.90. I'm not sure if it's region locked or not. But early research points to yes, it is region locked.
http://www.play-asia.com/paOS-13-71-dw-49-en-70-2rho.html
http://www.play-asia.com/paOS-13-71-dw-49-en-70-2rho.html