PayPay is a mobile payment service in Japan that allows users to make cashless transactions using their smartphones. Launched in 2018, it enables customers to pay for goods and services at participating merchants by scanning QR codes or using NFC technology. The service is popular for its ease of use and various promotions, including cashback offers. Users can link their bank accounts or credit cards to the app, making it convenient to manage payments and track spending. PayPay has become a significant player in Japan's growing digital payment landscape.