Guida
Located near the southern tip of Hyuga Misaki, "Umagase" is a representative scenic spot of the Nichihoku Kaigan Quasi-National Park. Its most striking feature is the 70-meter high sheer cliff face, carved with regular, rhythmic patterns of columnar joints. This unique topography was formed by submarine volcanic activity approximately 15 million years ago, presenting an overwhelming landscape that showcases the wonders of nature. The name "Umagase" (Horse's Back) comes from the way the rock face resembles the back of a horse when viewed from the sea.
This site holds immense geological value. The rocks composing the cliffs are primarily welded tuff; during volcanic activity, the cooling and contraction of flowing lava created these distinct, regular cracks known as columnar joints. Recognizing its unique landscape and academic significance, the site was designated as a National Natural Monument on February 13, 2018. For generations, it has been cherished by locals and tourists alike as a symbol of nature's sculptural beauty.
The primary viewpoint is the observation deck located at the end of a well-maintained promenade. From here, you can witness the unobstructed horizon of the Pacific Ocean alongside the massive, looming cliffs. The intricate textures of the columnar joints and the complex coastal topography shaped by waves tell a story of long-term natural erosion. Additionally, nearby is the