Temperatures and ClothingThe temperature ranges from about 15 to 25 degrees Celsius. It can be cooler, but still warm during the day. A light jacket or sweater is all you need. Ruins of Takeda Castle (Castle in the Sky) (Hyogo) The "Ruins of Takeda Castle" is located at the top of Mt. The castle is a fantastic sight as a "castle in the sky" floating in a sea of clouds.