Yes, you can see Mount Fuji from the Shinkansen (bullet train) when traveling from Osaka to Tokyo, but only if you sit on the correct side and have clear weather. When traveling Eastward (toward Tokyo), you must reserve a Seat A (the window seat on the left side of the train). The best viewing window occurs approximately 45 to 50 minutes before you arrive at Tokyo Station, specifically around the Shin-Fuji Station area. On a clear 2026 day, the mountain will loom large and majestic for about 3–5 minutes. If you are traveling Westward (toward Osaka), you should choose Seat E (the window seat on the right). Because summer in Japan can be quite hazy, your best chances of a clear sighting are in the winter months (December–February) and during early morning departures. Pro tip: if the train is not fully booked, you can often move to a vacant A or E seat for a few minutes to snap a photo, but keeping your original seat on the "Fuji side" is the only way to guarantee a perfect 2026 view.