Are there any store or membership cards you can put on your phone using an app like Stocard. Some retailers have apps which you can store your card onto (like Costco). Source: almost 2 years ago

Stocard - All your loyalty cards in one app. From the biggest supermarket to your local flower shop - you can add the card to Stocard. https://stocardapp.com/en/us. Source: almost 2 years ago

Yeah you should vpn to Japan then add an account to your android phone in the setting. You can either add a gmail not tied to any android phone or create a new one. Once you get to the "add payment" step enter the dummy details (unless you really do have a Japanese cc add that) you can use this Link to generate a dummy cc (make sure you select visa). Source: about 2 years ago