What is PayPay?PayPay is a mobile payment service app that allows users to make purchases via QR codes or barcodes. Launched in December 2018, it quickly became one of Japan's most popular mobile wallets, with over 67 million registered users as of early 2025. PayPay is widely accepted across Japan, from small local shops to large retail chains, making it an essential tool … [Read more...] about PayPay: A Comprehensive Guide for Foreigners in Japan