The main building was built in 1931 as the Army's 4th Division headquarters building at the same time as the Osaka Castle castle tower, and since then it has long been popular as the Osaka City Museum. 16 years after the museum closed, it has been renovated and reborn as a shop, cafe, restaurant, and museum. It is a facility where you can enjoy relaxing meals and shopping in a perfect location with the castle tower right in front of you. At ``BLUE BIRDS ROOF TOP TERRACE'' on the rooftop, you can enjoy barbecue and tapas dishes while looking at the castle tower up close (scheduled to be closed for winter from December to February). Additionally, the Kaiyodo Figure Museum Miraiza Osaka Castle has opened in the basement. With the main concept of ``disseminating the appeal of Japanese pop culture through figures,'' there are more than 3,000 figures of various genres on permanent display, ranging from palm-sized to human-sized.