Thanks so much for this info! I wonder if this is the way to go... Order a sim card online and ship it to the proxy service. Or they can buy one for you? Then they can activate the sim and register a Lawson account on your behalf, and then ship the sim card to your hotel in Japan. When you get the sim card, I am hoping that using your own phone, you would still be able to login to the app. I think apps are not really tied to a phone, just to an email or mobile number.