The Dogama was formed when the flow of the Sadamitsu River hit a rock, causing erosion. The hole is about 10 meters in diameter and 10 meters deep, and looks like a large cauldron.

Narutaki is a waterfall next to the Dogama. It was named Narutaki because the water falling from the pool in the water swirls and roars.

There is no parking lot around the Dogama, so you will need to park at the Narutaki parking lot, about a 10-minute walk (600m) away.