Japan is moving towards becoming a cashless society, with a range of payment options available for travelers. Credit cards are widely accepted, as are prepaid cards such as Suica or Pasmo. Mobile payment apps like Apple Pay and Google Pay are also popular, as are QR codes and IC card readers. Debit cards can be used at some ATMs and major retailers, while online payment services like PayPal and Alipay can be used for online purchases. Travelers should be prepared with some cash, however, as smaller businesses may only accept cash payments. It's also important to be respectful of cultural norms when making payments in Japan.