The moat of Goryokaku Park in winter is illuminated with approximately 2000 light bulbs, creating a beautiful star shape. It is recommended to enjoy it while strolling along the park's promenade, or to view it from the Goryokaku Tower Observation Deck. The Special Historic Site Goryokaku Fort Remains, which has been the stage for numerous historical events, is characterized by its star-shaped moat. "Goryokaku Hoshi no Yume (Hoshino Yume)" is an event that outlines this moat with illuminations during winter, making it float fantastically.