While the Suica card is incredibly versatile in 2026, there are still several notable "dead zones" where it cannot be used. First, you cannot use it for continuous travel between different IC card regions; for example, you cannot tap in at a station in Tokyo (JR East) and tap out at a station in Osaka (JR West). You must buy a physical ticket for such long-distance travel or use the Shinkansen's "Smart EX" system. Second, it is generally not accepted on long-distance highway buses or some very rural, "mom-and-pop" local bus lines in prefectures like Okinawa or parts of Hokkaido. Third, while most convenience stores accept it, many traditional shrines, temples, and small local markets (like those in Kyoto's outskirts) still require physical Yen. Additionally, you cannot use Suica at PiTaPa-only areas in the Kansai region for certain types of shopping, although it works for the trains there. Finally, you cannot use it to pay for "Limited Express" or "Green Car" surcharges on the train itself; you must purchase those specific supplemental tickets at a machine or via an app before you board.