Yes, Universal Studios Japan (USJ) tickets, and particularly Universal Express Passes, frequently sell out in advance, often weeks before the visit date. While standard "Studio Passes" (entry tickets) are generally available unless the park reaches absolute maximum capacity during peak holidays like Golden Week or New Year, the Express Passes are highly limited and can sell out within minutes of being released. In 2026, USJ releases its tickets exactly 60 days in advance at midnight Japan time. If you want a specific Express Pass that includes timed entry to popular areas like Super Nintendo World or The Wizarding World of Harry Potter, it is vital to book as soon as that 60-day window opens. During themed events like Halloween Horror Nights, demand spikes even further. If tickets are sold out on the official website, travelers often check authorized partners like Klook or Rakuten Travel. If you arrive without a ticket, you run a high risk of being turned away at the gate or, at the very least, waiting in a multi-hour queue only to find that the most popular areas require "Area Timed Entry" tickets that are already gone.