Furuiwaya

Furuiwaya is a rock formation site featuring multiple cone-shaped structures such as Senkutsu-iwa, Tsurigane-dake, and Katsura-dake in Kumakogen. These formations display natural geological patterns created by water erosion over time.

The sedimentary rock layers of Furuiwaya formed approximately 45 million years ago through continuous water erosion. This prolonged erosive process created numerous cavities and distinctive shapes in the stone.

The name Furuiwaya means Ancient Rock House, and local stories tell of meetings between the Buddhist monk Kobo-Daishi and a demon called Amanojaku at this place. The rock formations hold cultural importance in the region and draw visitors interested in the connection between nature and local traditions.

The site is located about 15 minutes by car from Kumakogen Town Hall and offers paid parking facilities. A walking path runs through the area, allowing visitors to explore the geological features at their own pace.

The rock faces support specialized plant species like iwamatsu spikemoss and several orchid varieties, including sekkoku and ucho-ran specimens. This adapted flora thrives in the unique conditions created by the crevices and cavities in the stone.