The Dewa Sanzan Tradition Shaped by Shinto-Buddhist Syncretism
Before the Meiji period, religious life at Dewa Sanzan was strongly influenced by Shinbutsu Shūgō, the traditional Japanese blending of Shinto and Buddhism. Each of the three mountains became associated with different Buddhist figures and religious concepts, creating a distinctive spiritual culture.
In this tradition, Mount Haguro was associated with Kannon Bodhisattva, Mount Gassan with Amida Buddha, and Mount Yudono with Dainichi Nyorai, or Mahāvairocana Buddha. A pilgrimage through the three mountains, symbolically representing the present, past, and future, and passing through three spiritual gateways on the way to the realm of Dainichi Nyorai, was known as Sanseki Sandō, or the “Three Gates and Three Crossings.” It was considered an important practice within Dewa Sanzan Shugendō.
As part of this spiritual discipline, making the pilgrimage to Mount Yudono barefoot was also regarded as an important practice. Purifying oneself amid the harsh mountain environment and entering the sacred mountain were themselves deeply connected with religious devotion.
The Deities of Yudonosan Shrine
Yudonosan Shrine enshrines the following three deities:
Ōyamatsumi-no-Kami: A deity traditionally revered as the guardian and ruler of mountains.
Ōnamuchi-no-Mikoto: A widely worshipped deity associated with the development and governance of the land, as well as marriage and harmonious relationships.
Sukunahikona-no-Mikoto: A deity closely associated with medicine, healing, and hot springs.
A Unique Sacred Precinct without a Main Sanctuary
Unlike most Shinto shrines, Yudonosan Shrine has no conventional main sanctuary or worship hall. Because the mountain itself is considered sacred, worship centers on the natural sacred object located within the mountain rather than on an architectural shrine building.
The Sacred Object
The sacred object of Yudonosan Shrine has traditionally been protected by the custom known as “do not ask, do not speak”. Details are not publicly disclosed. Rather than simply viewing and understanding the sacred object, visitors enter the sacred area and experience its spiritual atmosphere through the act of worship itself.
The Worship Office and Purification Area
A worship office is located within the precincts. Before entering the sacred area, visitors must also pass through a purification area. Here, they remove their footwear and perform a purification ritual using a paper human effigy known as a hitogata.
Only after completing this purification does one proceed into the sacred area. This ritual preserves Yudonosan’s distinctive tradition of symbolically leaving the everyday world behind and crossing into a sacred realm.
Yudonosan Shrine Pilgrims’ Lodge
Near the entrance to Yudonosan Shrine is the Yudonosan Shrine Pilgrims’ Lodge. Facilities around the entrance include a large torii gate, shops and dining facilities, and the pilgrims’ lodge, which also serves as the shrine office.
Because Yudonosan Shrine is located deep in the mountains, this area serves as an important base for visitors preparing to enter the sacred precincts.
Mitaki Shrine and Its Sacred Waterfall
Farther inside the sacred area is Mitaki Shrine, where the waterfall itself is regarded as the sacred object.
The waterfall was once worshipped as Fudō Myōō, the Buddhist deity of immovable wisdom and spiritual protection. Today, it is enshrined as Seoritsuhime-no-Kami. Even in the middle of summer, extremely cold snowmelt water flows down from the waterfall.
Waterfall Asceticism in the Mountain Environment
At Mitaki Shrine, practitioners can be seen undertaking takigyō, a form of ascetic practice in which participants stand beneath the falling water of the cold waterfall.
This practice offers a glimpse into Yudonosan’s distinctive religious culture, in which the harsh natural environment itself becomes a place of spiritual training.
Osawa-gake: Visiting the Thirteen Auxiliary Shrines
As water from Mitaki Shrine flows toward the sacred bridge, 13 auxiliary shrines are located along both sides of the stream. Visiting these shrines in sequence is known as Osawa-gake.
This pilgrimage practice involves moving through the mountains, streams, and waterfalls while worshipping the deities associated with the natural landscape, making it a distinctive expression of Yudonosan’s traditional spiritual culture.
A Sacred Area Protected by the Tradition of Silence
Since ancient times, Yudonosan has maintained the custom of “do not ask, do not speak,” meaning that visitors should not reveal in detail what they see or experience within the sacred area.
Even today, photography of the sacred object and certain parts of the sacred area is strictly prohibited. This helps preserve the solemn atmosphere of Yudonosan, which feels quite different from an ordinary sightseeing destination.
Matsuo Bashō’s Poem about Yudonosan
In 1689, during the Edo period, the celebrated haiku poet Matsuo Bashō visited Dewa Sanzan and made a pilgrimage to Mount Yudono. His experience was recorded in his travel diary Oku no Hosomichi (The Narrow Road to the Deep North).
He left the following famous haiku about Yudonosan:
“Unspoken, the sacred Yudono—my sleeves are wet.”
The poem reflects the distinctive tradition of keeping one’s experience of the sacred mountain private rather than speaking openly about it. Bashō’s words convey the mysterious atmosphere surrounding Yudonosan and its deeply personal form of religious experience.
A Sacred Mountain Where Pilgrims Worship Barefoot
At Yudonosan Shrine, visitors traditionally remove their shoes and undergo purification before entering the sacred area. This act is not simply a physical cleansing; it also symbolizes crossing the boundary between the everyday world and a sacred realm.
With no conventional main sanctuary or worship hall, Yudonosan Shrine instead venerates the mountain, waterfalls, and pure flowing water as sacred elements of nature. The site preserves the spiritual traditions of mountain worship and Shugendō that have been passed down through Dewa Sanzan.
A Sacred Site Where Nature Itself Becomes the Place of Worship
Yudonosan Shrine differs fundamentally from an ordinary shrine centered on buildings and architecture. Its greatest attraction lies in its distinctive religious tradition, in which the mountain, waterfalls, and clear mountain water themselves are accepted as sacred.
The history of Shinto-Buddhist syncretism, the spiritual practice of Sanseki Sandō, the tradition of “do not ask, do not speak,” and the custom of barefoot pilgrimage have all shaped Yudonosan’s unique identity over many centuries.
When exploring Dewa Sanzan, visiting Yudonosan together with Mount Gassan and Mount Haguro provides an opportunity to experience the profound connection between nature, spirituality, pilgrimage, and traditional culture that has been preserved in Yamagata for generations.