This giant outcropping can be seen from Akita City almost 30km away, and has even appeared in elementary school science textbooks. Leaning 30° to the east, it is formed of layers of mud (light colored areas) and sand (dark colored areas). These layers were formed through a cycle of mud accumulating in deeper water, followed by sand accumulating in shallower water. It later rose out of the water, becoming land, and now stands about 100m tall. When Wakimoto Castle was built during the Warring States Period (approx. 1467-1590 CE), it made good use of this cliff’s height.