The Suica card can be used in the majority of Japanese public transport: subways, buses and all local trains, as well as in buses and taxis displaying the Suica logo. Please note that the Suica card does not work on express trains, shinkansen, highway buses or airport shuttles.

In 2026, while the Suica card (originally from JR East) is incredibly versatile, it cannot be used "everywhere" in Japan, though it is compatible with almost all major urban transit systems. Since the 2013 "IC Card Interoperability" agreement, a Suica can be used for trains, subways, and buses in Tokyo, Osaka, Kyoto, Nagoya, and Fukuoka. However, it cannot be used for "cross-area" travel; for example, you cannot tap in at a station in Tokyo and tap out in Sendai, even if both areas accept Suica. You must use a paper ticket or a Shinkansen-specific booking for such long-distance travel. Furthermore, many small, rural bus lines and "private" railways in remote mountainous regions or smaller islands still rely on cash or their own local, non-compatible IC cards. In 2026, Suica is also widely accepted at convenience stores, vending machines, and some taxis, but "off-the-beaten-path" Japan still requires you to carry yen for local transit and smaller vendors.