The official Xenoblade Chronicles 2 Production Notes website has announced an Official Soundtrack release for the game in Japan.
According to the production notes, the official soundtrack will be available in Japan on May 23, 2018. It will be sold in three different versions – USB Deluxe Edition, Deluxe Edition, Regular, and finally Digital.
The USB Deluxe Edition, exclusive to Amazon Japan, comes with a Core Crystal USB (contains wav data of all songs) tagged with a serial number, gorgeous box, gorgeous booklet, message card, and piano score. There will only be 2000 pieces produced in the world. Import here (ships worldwide).
Next up is the Deluxe Edition, also exclusive to Amazon Japan. It comes with a CD containing all songs, gorgeous box, gorgeous booklet, message card, and piano score. Import here (ships worldwide).
The Regular Edition, which comes with a single CD and nothing else, will be sold at Japanese retailers. The Digital Edition will be distributed online via iTunes, Amazon, Google Play Music, and other services.