Yes, you can visit both Tokyo Disneyland and Tokyo DisneySea in one day, but only if you purchase a specific "1-Day Park Hopper" ticket. As of 2026, the standard "1-Day Passport" only allows entry to one park for the entire day. However, for a limited period (currently scheduled through March 31, 2026), Disney is offering a Park Hopper option that allows guests to start at one park and "hop" to the other after 11:00 AM. This is a departure from previous years where hopping was restricted to multi-day tickets. If you plan to do both in one day, be aware that the parks are massive and have very high demand; most 2026 visitors find that one day per park is necessary to fully experience the unique attractions, especially the world-exclusive rides at DisneySea's "Fantasy Springs" expansion.