In 2026, the Japan Rail (JR) Pass still has significant exceptions, most notably the Nozomi and Mizuho Shinkansen trains. While you can now ride these "top-tier" express trains with a JR Pass, you are required to purchase a separate "supplemental ticket" for each leg, which can cost between 4,000 and 8,000 yen depending on the distance. Without this supplement, your pass only covers the slightly slower Hikari, Sakura, and Kodama services. Additionally, the JR Pass does not cover private (non-JR) railway lines, such as the Odakyu Romancecar to Hakone or the Tobu lines to Nikko. Some JR trains that "track-share" with private companies (like the Fuji Excursion) will require an extra on-board fare for the portion of the journey on private tracks. Finally, in 2026, the pass does not include "Gran Class" or "Sleeper Cabin" fees; even with a Green Car (First Class) pass, you must pay the full limited express and berth charges to use these luxury amenities.