@2ChillVisual If your phone doesn't get fixed, I don't know if you can get help in languages other than Japanese, but why not try contacting the support number on the page below?
https://t.co/tnLIH0j63Z
@2ChillVisual Does that mean it was purchased from a vending machine at the airport? In that case, since you cannot contact the store, why not refer to the following page and set it up?
https://t.co/2xS1gMPXGF
@2ChillVisual Excuse me for interrupting your conversation. If you can use the internet at the airport, but it stops working when you leave the airport, it is possible that your SIM card is not responding. Please turn off your device and try removing and inserting the SIM card.