The primary difference between the Hikari and Nozomi Shinkansen services lies in their speed and the number of stops they make along the Tokaido and Sanyo lines. The Nozomi is the fastest "express" service, skipping many intermediate stations and reaching Osaka from Tokyo in about 2.5 hours. Historically, the Japan Rail Pass did not cover the Nozomi at all. However, as of 2026, JR Pass holders can now ride the Nozomi, but it requires the purchase of a supplementary ticket (ranging from ¥4,000 to ¥6,500 depending on the distance). The Hikari, on the other hand, is a "semi-fast" service that makes more stops than the Nozomi but is fully included in the base price of the JR Pass. While the Hikari takes roughly 30 minutes longer to reach Osaka, many travelers choose it to avoid the extra surcharge. Both trains use the same high-speed N700S series rolling stock and offer identical levels of comfort and on-board amenities, so the choice ultimately comes down to whether you prioritize saving 30 minutes of time or saving on out-of-pocket costs.