A stratum of the Tanabe strata which is a forearc sediment, exposes on land as a vast wave-cut terrace as the famous Senjojiki Rock Plateau in Shihara. You can see the layers of mudstones and sandstones. as well as sea cliffs, sea caves, and wave-cut terraces. There are numerous trace fossils, too. At the south seashore, you can observe the inclined stratum of the lower layer of the Tanabe strata.