A free app for Android, by JALペイメントポート株式会社.

How does JAL Global WALLET work?

Global WALLET is a prepaid card that is loaded with Japanese yen. You can use this card to make payments in the currency of your choice. This card is issued by JAL Mileage Bank, so you can use it to pay for your travel expenses, including airfare, lodging, train fare, and rental car. You can also use Global WALLET to pay at stores that accept Mastercard, as well as to pay for purchases on online websites that are associated with Mastercard.

As for the money you receive, you can use it to make payments at other banks or to pay your bills. You can also use it to make a deposit at Sumishin SBI Net Bank, the bank that is associated with this service.