If you change your country, you'll need to wait a year to change it again.
1
On your Android device, open the Google Play Store app .
2
At the top right, tap the profile icon.
3
Tap Settings General Account preferences. Country and profiles.
4
To change countries, tap the name of the one you want to change to.
Go to Settings > Accounts > Add Account > Google. Sign in with the new Japanese Google account. Change Play Store Region: Open the Google Play Store, go to the Account section, and switch to your newly created Japanese Google account. The Play Store should now be set to the Japanese region.
