Game Japanese, frame rate drop

I have a problem playing the Japanese version of Bang Dream.
The frame rate dropped when I played BanG Dream, I was very disappointed in Asus.
i thinks is this really Snapdragon 855? really disappointing.
Not only for BanG Dream, but all Japanese games are below 25fps.
for the next updates, please fix the problem when playing the Japanese version of the game.
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Is the Japanese version available from play store? I can't find it