Both JR and private railway companies use IC cards, subways use IC cards, and most buses accept IC cards. There are some buses in more rural areas that do not offer this payment method, but in larger cities they are widely used. Long distance buses also require a paper ticket rather than an IC card.

While not legally "mandatory," having an IC card (like Suica, Pasmo, or Icoca) is essentially a necessity for a smooth travel experience in Japan in 2026. These rechargeable "tap-and-go" cards allow you to ride almost all subways, buses, and local trains without the hassle of calculating fares or buying individual paper tickets at machines. Beyond transit, IC cards are widely accepted at convenience stores (Konbini), vending machines, and even many casual restaurants and coin lockers. In 2026, with the ongoing physical card shortages, many travelers utilize the Digital IC card integrated into Apple Wallet or Google Pay, which can be topped up instantly using a credit card on your phone. If you prefer a physical card, "Welcome Suica" or "Pasmo Passport" are special versions designed specifically for tourists that don't require a deposit. Without an IC card, you will spend a significant amount of your trip fumbling with coins and standing in lines at ticket kiosks, making it the single most important "tool" for navigating Japan's incredibly efficient but complex transportation infrastructure.