Tickets are required to enter the Main Tower and Osaka Castle Museum, as well as Nishinomaru Garden. Opening hours – 9 a.m. to 5 p.m. daily (last admission at 4:30 p.m.). Hours are extended on certain days of the year for spring and summer festivities. Osaka Castle is closed from Dec.

You do not need a ticket to enter the Osaka Castle Park or to view the exterior of the castle itself; these areas are free to the public and are a popular spot for locals to enjoy cherry blossoms. However, if you want to enter the Main Tower (the Museum) to see the historical exhibits and access the 8th-floor observation deck for a 360-degree view of the city, you must purchase a ticket. In 2026, the entrance fee for adults is 600 yen. You can purchase these tickets at the automated kiosks near the castle entrance or use the Osaka Amazing Pass, which provides free entry to the tower. The castle is open from 9:00 AM to 5:00 PM, and it is highly recommended to arrive early, as the line for the elevator can become quite long. If you are on a budget, simply walking the massive stone walls and exploring the secondary citadels and gates provides a fantastic sense of the castle's history without spending a yen, as the "scale" of the fortification is best appreciated from the outside.