Yes, you can do both Hakone and Mt. Fuji in one day from Tokyo in 2026, but it is a very fast-paced 12-hour journey. The most efficient way is via a guided bus tour, which typically departs Shinjuku around 8:00 AM. These tours go to the Mt. Fuji 5th Station (2,400m) in the morning for the views, then travel to Hakone in the afternoon for the Lake Ashi "Pirate Ship" cruise and the Hakone Ropeway (cable car). If you go independently using the Hakone Free Pass and trains, it is much harder to "summit" the 5th Station and see Hakone in one day due to the complex bus transfers between the two regions. In 2026, many travelers prefer the "Hakone-only" day trip for a more relaxed experience, as trying to fit both often leaves you with only 20-30 minutes at each iconic spot. For the best 2026 experience, choose a tour that returns to Tokyo via the Shinkansen (Bullet Train) from Odawara to save 90 minutes of evening traffic.