Yes, you can make payment by simply scanning the barcode on the conbini slip with the FamilyMart’s "FamiPay" app downloaded to your smartphone.
With the app, payment can be made anytime, anywhere without going to a convenience store.
For more information on the “FamiPay Bill Payment Service” (including how to download the app, add money to your FamiPay account, and make payments), visit the FamilyMart’s website (in Japanese only).
Note: The maximum amount of payment you can make using this service is less than 50,000 yen per payment.