Wait, so only the japanese version is going to have infrastructure? That kinda sucks.
Your game isn't importing because the saved game files are of different types. ULUS is the one you're probably trying to import but MHP2G does not recognize EUR or USA formats. Sucks for this, I had to borrow a Japanese UMD of MHF2 from my friend just so I can import it to MHP2G when my order arrives
