Yes, you can use a Pasmo card across nearly all of Japan due to the Nationwide Mutual Usage Service integration. While Pasmo is issued by private railway and bus companies in the Tokyo metropolitan area, it is fully compatible with other major IC card systems like Suica, Kitaca, ICOCA, and SUGOCA. This means you can use your Pasmo to ride subways in Osaka, buses in Kyoto, or the JR lines in Sapporo and Fukuoka. However, there are two critical limitations to keep in mind for 2026: first, you cannot use the card to travel between different regions (e.g., you cannot tap in at Tokyo and tap out at Nagoya); you must stay within the local network. Second, the card cannot be used for the Shinkansen (bullet train) without separate registration or through a mobile app like SmartEX. For most standard city travel and convenience store purchases nationwide, your Pasmo functions exactly like a local card.