As of 2026, you can ride the high-speed Nozomi and Mizuho trains with a Japan Rail Pass (JR Pass), but only if you purchase a supplemental "[ONLY WITH JAPAN RAIL PASS] NOZOMI MIZUHO Ticket" for each journey. Historically, these fastest Shinkansen services were completely excluded from the pass, forcing holders to use the slightly slower Hikari or Sakura trains. Now, while the basic JR Pass still doesn't cover the full fare, you can pay an additional fee—typically ranging from 2,000 to 5,000 yen depending on the distance—to upgrade your trip. This supplemental ticket can be purchased at JR ticket machines or "Midori-no-madoguchi" offices in Japan. It allows pass holders to utilize the most frequent and fastest connections between major cities like Tokyo, Kyoto, and Osaka, which is particularly useful during peak travel seasons when other trains may be fully booked. However, if you choose not to pay this extra fee, you must stick to the Hikari, Kodama, or Sakura services, which remain fully covered by the standard pass and offer nearly identical comfort, albeit with a few more stops along the route.