It's possible to transfer save files from one region to another, through an app called JK Save Manager. SVDT also, but for the sake of this tutorial I will be using JK Save Manager. This is nothing new, I just decided to write up a tutorial for those who are new to the scene and are wondering how to transfer saves. Rhythm Tengoku: The Best Plus is an example of a Japanese game, in which you could export & Import it's save into the USA/EUR version of Rhythm Heaven Megamix....
[Tutorial] Transferring Saves between different regions [Ex: JP to USA]
[Tutorial] Transferring Saves between different regions [Ex: JP to USA]