Heading down the coast road towards Cape Muroto is a familar site to anyne who has walked or cycled the Shikoku Pilgrimage known as Ohenro. As you approach the cape a group of towering rocks becomes visible.
Once there you see that a pair of these rock pillars has a shimenawa, sacred rope, strung between them. These roks are known as Meoto Iwa, or "married rocks". The larger rock is considered male and the smaller, female. They are one of the attractions of the UNESCO Global Geopark of Muroto Cape
Meoto Iwa appear at numerous places around the coast of Japan, and I must have seen half a dozen around the western part of the country, but the most famous ones are on the coast of Mie not too far from the shrine at Ise.