Yes, you can use a Pasmo card all over Japan in 2026, thanks to the Nationwide Mutual Usage Service established between major IC cards. Whether you have a physical Pasmo, a Pasmo Passport (for tourists), or a digital version in your Apple/Google Wallet, it will work on almost all trains, subways, and buses in major cities like Tokyo, Osaka, Kyoto, Sapporo, and Fukuoka. It is essentially interchangeable with the Suica or ICOCA cards. You can also use it to pay at convenience stores, vending machines, and many restaurants across the country. The only minor limitation is that you generally cannot use it for "continuous travel" between different IC regions (e.g., you can't tap in at a station in Tokyo and tap out at a station in Osaka using only the IC card); for those long-distance trips, you still need to purchase a Shinkansen ticket. For 2026 travelers, using the digital version on a smartphone is the most recommended method to avoid physical card shortages.