Calling the folded rock formation "Odori-iwa (Dancing Rock)" is a dynamic, lively expression. There was also an explanation that it's rhyolite. Along the nearby coastline you can see dynamic movements of the rock strata everywhere, which I thought was amazing.

The sign is inconspicuous so it's easy to miss, but it's on the mountain-side cliff along the seaside path with the old trolley tracks. You can see rock strata folded into swirls.