In 2026, the general peer-to-peer advice is that you should not exchange a large amount of money before arriving in Japan, especially if you are traveling from the U.S. or Europe. You will almost always get a significantly better exchange rate by using an ATM at a Japanese airport (like Narita or Haneda) or by withdrawing cash from a 7-Eleven (7-Bank) or Japan Post ATM once you land. While Japan is becoming more credit-card friendly, it remains a cash-heavy society, particularly at smaller ramen shops, temples, and local markets. A high-value strategy is to carry a "backup" $100 in your own currency for emergencies, but rely on your debit card for Yen. It is essential to ensure your card is "travel-notified" and that you use an ATM in Japan that explicitly supports international cards. Additionally, consider getting an IC card (like Suica or Pasmo) on your phone's digital wallet; you can load it with a credit card to pay for trains and convenience stores, further reducing your need for physical cash while enjoying the best possible conversion rates.