Osaka Castle is a landmark building in Osaka and a witness to Japanese history. It was built in 1583, and the existing building is a concrete structure rebuilt in 1931. The castle tower has five floors on the outside and eight floors on the inside, and is 55 meters high. The golden animal head tiles on the roof and the crouching tiger under the brothel are dazzling. Its white walls are matched with green roof tiles, and the golden dragon shape at the end of the eaves is even more magnificent. The interior has been transformed into a museum, displaying historical materials of Toyotomi Hideyoshi and the Warring States Period. Each floor has a wealth of exhibits, such as armor, swords, screen paintings, etc., and there are also experience activities to try on Warring States costumes. The top floor observation deck overlooks the city of Osaka. However, taking photos is prohibited on the third and fourth floors. In spring and autumn, cherry blossoms and maple leaves add a romantic touch to the castle tower. In addition, the night view of the castle tower is also very charming and has been selected as the "Japanese Night View Heritage". In short, Osaka Castle is not only a magnificent building, but also carries a rich history and culture. It is a must-see attraction for Osaka trips.