Tarumizu Site is a mysterious historic and spiritual site located deep in the mountains beyond Yamadera (Risshakuji Temple) in Yamagata Prefecture. Until around the Taisho period, the area was used by yamabushi, mountain ascetics who practiced spiritual training in the mountains.
The site is traditionally regarded as the remains of a place where Jikaku Daishi Ennin, the monk credited with founding Yamadera, stayed and practiced during the early development of the temple. One of the caves directly in front of the site is said to have been one of these early practice areas.
Huge rock cliffs are covered with unusual honeycomb-like cavities and caves, while small shrines such as Kofun Shrine and Inari Shrine are built among the rocks. Water drips from cracks in the massive rock formations, and a statue of Fudo Myoo, the Buddhist deity associated with wisdom and spiritual protection, is enshrined deep within one of the darker crevices.
It is also said that an image of Senju Kannon, the Thousand-Armed Kannon, was carved into the rock surface on the left side. The site offers a remarkable glimpse into the way earlier generations combined reverence for nature with Buddhist and Shinto beliefs.
Deep in the mountains behind Yamadera lies an area known as Mine-no-Ura, sometimes called “Ura-Yamadera,” meaning “the Yamadera behind the mountain.” For more than 1,000 years, monks and ascetics are said to have come here for meditation and spiritual training.
The area is traditionally associated with Jikaku Daishi Ennin, who is said to have considered the concept and layout of Yamadera here before establishing the temple.
Mine-no-Ura contains several sites associated with the early spiritual history of Yamadera, including Senjuin, Eboshi Rock, former training grounds, and the Tarumizu Site. Among them, Tarumizu is particularly striking for its unusual rock formations and spiritual atmosphere.
The natural and historic sites of Mine-no-Ura are connected by walking trails. Access to the area is possible from near the grounds of Senjuin Kannon-do and from the entrance near Yamadera Cemetery.
Tarumizu Site is a hidden destination located about a 15-minute walk from the entrance to the mountain trail. As the trail winds through the surrounding forest, visitors suddenly encounter enormous rock faces covered with honeycomb-like cavities, together with the distinctive shapes of traditional torii gates.
The area preserves traces of the mountain ascetic practices that continued until the Taisho period. A statue of Fudo Myoo is enshrined within a crack in the rock, while remains associated with religious training and Gorin-to cave monuments can also be found in the area.
The combination of naturally weathered rock formations, wooden torii gates, and dense mountain vegetation creates a deeply mysterious atmosphere.
One of the most distinctive features of Tarumizu is its enormous rock wall filled with numerous honeycomb-shaped cavities. These unusual formations were created through the erosion of the rock by water over a long period of time.
Among the rocks stand a torii gate associated with Kofun Shrine and Inari Shrine. A narrow crack in the side of the cliff contains an enshrined image of Fudo Myoo, creating a striking combination of natural scenery and religious devotion.
Hojuzan Senjuin stands at the foot of Risshakuji Temple and is traditionally regarded as one of the places associated with the founding of Yamadera by Jikaku Daishi Ennin.
Its principal image is a standing wooden statue of Senju Kannon, the Thousand-Armed Kannon, traditionally attributed to Jikaku Daishi. The original statue is kept as a hibutsu, or secret Buddhist image, and is not normally displayed to the public. Instead, visitors can worship a gilded standing statue of Senju Kannon approximately one meter tall.
The mountain behind Kannon-do contains several sites that recall the earliest period of Yamadera, including the Tarumizu Site, where Fudo Myoo is enshrined, the seven rocks of Shiroiwa, and the Mine-no-Ura archaeological sites.
The area therefore provides an opportunity to explore a side of Yamadera that is quite different from the better-known temple buildings and stone stairway.
Continuing along the walking trail, visitors reach a group of seven distinctive rocks known as the Shiroiwa Seven Rocks.
Viewed from a distance, the arrangement of the rocks resembles a natural mountain fortress. Beyond them lies an open area surrounded by unusual rock formations.
This open space is believed to have been used for special Shinto ceremonies, suggesting that the area was an important setting for religious practices long before modern tourism developed here.
Near the entrance to the walking trail at Yamadera Cemetery are the remains of the main temple site of Mine-no-Ura.
The former main temple is believed to have enshrined Amida Nyorai, the Buddha of Infinite Light and Life. Although the original building no longer survives, archaeological excavations have revealed the foundations of its structures.
Excavations have also uncovered artifacts dating back as far as the 14th century, as well as fragments of pottery from the Jomon period, dating from approximately 10,000 to 300 BCE.
The Tarumizu Site offers a rare opportunity to experience the spiritual landscape that developed around Yamadera long before it became one of Yamagata’s best-known tourist destinations.
The honeycomb-like cliffs, caves, dripping water, torii gates, Buddhist images, and traces of mountain ascetic practices are closely intertwined with the surrounding natural environment. Together, they reveal how earlier generations viewed mountains not simply as scenery, but as places of religious practice and spiritual significance.
For visitors exploring Yamadera, a walk into Mine-no-Ura and Tarumizu provides a quieter and more mysterious experience, offering a glimpse into the ancient religious traditions that lie behind the famous temple complex.