Yes, Osaka Castle is included in the Osaka Amazing Pass. The pass provides free admission to the Osaka Castle Main Tower (standard price approx. ¥600) and the nearby Nishinomaru Garden. Beyond the castle itself, the pass also grants free entry to other castle-related attractions, such as the Osaka Castle Museum and the Osaka Castle Gozabune Boat (a gold-leafed boat that cruises the castle moat). The Osaka Amazing Pass is a comprehensive sightseeing ticket available for 1 or 2 days, offering unlimited use of the Osaka Metro and city buses, plus free entry to over 40 top tourist sites, including the Umeda Sky Building and the Tempozan Giant Ferris Wheel. Because the castle is one of Osaka's most popular landmarks, the pass is generally considered an excellent value for travelers planning to visit the tower and at least two other major attractions in a single day, as the combined savings on transport and entry fees add up quickly.