Hakusan Dōmon

Hakusan Doemon is a granite sea cave in Tosashimizu that measures 16 meters in height and 17 meters in width, making it the largest formation of its type in Japan. The natural arch was carved by water erosion over millions of years, creating a distinctive opening through solid rock.

The site was shaped by water erosion working on granite over millions of years, gradually cutting through the solid rock. This geological process created the arch formation visible in the coastal landscape today.

The granite formation holds spiritual importance with a shrine positioned above the natural arch, blending religious practice with the coastal landscape. People visiting the site experience how Japanese culture integrates sacred spaces within natural geological features.

Access is through the Cape Ashizuri Nature Trail, where sturdy walking shoes are necessary due to steep and uneven steps. The trail runs along the coast and can be exposed to changing weather, so visitors should dress in layers.

The cave formation displays different shapes depending on the viewing angle, resembling a heart or a face in certain perspectives. These natural patterns in the rock give visitors multiple ways to perceive and interpret the formation.