On your final day, take a day trip to Osaka Castle, one of Japan's most famous landmarks. Located just a short distance from Abeno Harukas, this historic castle offers a glimpse into Japan's feudal past. Explore the castle grounds, visit the museum inside, and enjoy the beautiful views from the top floor. Afterward, head to the nearby Osaka Castle Park, a spacious park with walking trails, gardens, and picnic areas. You can also rent a boat and paddle around the moat surrounding the castle. In the evening, return to Abeno Harukas and enjoy a relaxing dinner at one of the rooftop restaurants, offering breathtaking views of the city.