This app was mentioned in 2 comments, with an average of 3.50 upvotes
EDIT: I thought it was a trailer, but it's gameplay footage recorded by a player.
That was quick! They just released the Valkyrie Profile prequel on the Japanese Play Store: https://play.google.com/store/apps/details?id=com.square_enix.android_googleplay.valkyriejp&hl=ja
You need a VPN to download it or you can get it through QuoApp.
Reviews on the app store isn't that great for some reasons..