The likelihood that credit cards are accepted decreases in small cities and towns, and thus it is advisable to keep cash at hand when visiting rural areas. Cash is often the only way to pay for small entrance fees at tourist sights, smaller restaurants and small shops. Many lockers also require coins.

While Japan is slowly moving toward a more "cashless" society, it remains a predominantly cash-heavy culture, and you should absolutely bring or withdraw significant amounts of cash for your trip. While major hotels, department stores, and high-end restaurants in cities like Tokyo and Osaka will accept credit cards, many local "ramen shops," traditional markets, temples, and small boutiques are cash-only. Additionally, you will need cash to "top up" your IC cards (like Suica or Pasmo) at train stations, as these machines often do not accept foreign credit cards. A good rule of thumb is to keep at least ¥10,000 to ¥20,000 in your wallet at all times for daily expenses and emergencies. The best way to get cash is through ATMs found inside 7-Eleven (7-Bank) or Post Offices, which accept most international debit cards and offer competitive exchange rates. Carrying large amounts of cash in Japan is generally very safe due to the country's extremely low crime rate, making it a standard part of the travel experience there.