Yes, you can do a day trip to Universal Studios Japan (USJ) from Tokyo, but it is an exhausting and expensive endeavor. To make it viable in 2026, you must take the Shinkansen (bullet train) from Tokyo Station to Shin-Osaka Station, which takes about 2.5 hours one way on the Nozomi train. You would need to leave Tokyo as early as 6:00 AM to arrive at the park gates in Osaka by 9:30 AM. Given that USJ often stays open until 8:00 PM or 9:00 PM, you would be looking at a 15-to-17-hour day. The round-trip train fare is approximately ¥29,000 (roughly $200), in addition to the park ticket. To ensure the trip is worth the effort, it is highly recommended to purchase a USJ Express Pass in advance; otherwise, you might spend the majority of your limited day standing in lines rather than experiencing the rides. While possible, most travel experts suggest staying at least one night in Osaka to actually enjoy the park without the looming pressure of a late-night return journey to Tokyo.