My understanding is that the answer is no. See this article for details: Change your Apple ID country or region - Apple Support
Is it possible to switch from a US iTunes Store to the korean one, download an app, and then use the same billing credentials from the US account to make in app purchases?
2 replies
You need a credit card issued in the country of the store you are attempting to use and a billing address in that country.
in app purchases with a different country