The arch is formed from Miocene-period sedimentary rock layers.
The site is known for 'Tsurube-otoshi,' where the sun appears to fall directly through the stone gate at specific times of the year.
The name 'Hi-no-Sekimon' translates directly to Sunrise Stone Gate due to the alignment of the sun during the solstice.
The rock formation is a result of long-term coastal erosion caused by strong Pacific currents.
Hi-no-Sekimon, or Sunrise Stone Gate, is a natural rock arch formed by wave erosion on the Pacific coast of the Atsumi Peninsula. Located in Tahara, Aichi Prefecture, the site features a prominent tunnel-like opening carved through jagged cliffside rock formations. The coastal area consists of volcanic sedimentary rock known as the Hi-no-Sekimon strata. It is a designated local scenic spot that highlights the geological power of the Pacific Ocean. Visitors can observe the arch from a designated viewpoint overlooking the coastline. The area is part of the larger Irago-misaki cape region.
The viewing platform along the coastal trail provides a centered perspective of the rock arch.
Wear sturdy walking shoes, as the path involves uneven terrain and sandy ground.
Bring wind protection, as coastal breezes on the Atsumi Peninsula can be strong year-round.
Check the tide charts before visiting to ensure the best view of the base of the rock formation.
Avoid visiting during active typhoon warnings or high-surf advisories due to dangerous coastal conditions.
Stay behind safety barriers and do not attempt to climb the unstable rock cliffs.
