It has been the economic powerhouse of the Kansai region for many centuries. Osaka's highlights include Osaka-jō and its surrounding park, Osaka Aquarium, the Blade Runner nightscapes of the Dōtombori area, and the wonderful Open-Air Museum of Old Japanese Farmhouses. Osaka has a humid subtropical climate that is mild with no dry season, constantly moist (year-round rainfall). Summers are hot and muggy with thunderstorms. Winters are mild with precipitation from mid-latitude cyclones. Seasonality is moderate.