The Founding of Osorezan and the Beginning of Its Religious Tradition
Jikaku Daishi Ennin and the Jizo Bodhisattva
The religious history of Osorezan is traditionally traced back to 862, when it is said to have been opened by Jikaku Daishi Ennin, a prominent monk of the Tendai school of Buddhism.
According to legend, while Ennin was studying in Tang China, he received a vision telling him that there was a sacred mountain in the east where he should enshrine Jizo Bodhisattva and spread the teachings of Buddhism. After returning to Japan, he traveled throughout the country in search of this sacred place and eventually arrived at Osorezan.
There, he is said to have carved an image of Jizo Bodhisattva and established Osorezan Bodaiji Temple. The temple remains the spiritual center of Osorezan today.
Jizo is traditionally regarded as a compassionate figure who protects people from suffering and watches over the souls of the dead. At Osorezan, devotion to Jizo has become especially closely connected with prayers for deceased family members and loved ones.
A Landscape of Hell and Paradise
Jigokudani and the Otherworldly Landscape
Throughout the temple grounds and surrounding area are a number of places whose names and landscapes are associated with Buddhist ideas of the afterlife. Jigokudani, or “Hell Valley,” is characterized by sulfurous smells, barren ground, volcanic rocks, and steam rising from the earth.
Another area, known as Chinoike Jigoku, or “Blood Pond Hell,” features reddish volcanic rock and soil. These stark landscapes have traditionally been interpreted as representations of the suffering and trials believed to await souls after death.
Sainokawara and the Stones of Departed Children
Sainokawara is another deeply symbolic area of Osorezan. According to Buddhist folk beliefs, it is associated with children who died before their parents. Visitors may see small piles of stones built as offerings or prayers for these children.
Colorful pinwheels can also be found turning in the mountain wind beside the stone piles. The sight is both beautiful and deeply moving, expressing the grief of parents and the hope that departed children will find peace.
Gokurakuhama: A Shore of Paradise
In striking contrast to the barren volcanic landscape is Gokurakuhama, or “Paradise Beach,” on the shore of Lake Usoriyama. Its white sand and tranquil water create an atmosphere of remarkable serenity.
The sudden transition from sulfurous valleys and barren rocks to a peaceful lakeshore is one of the most powerful experiences at Osorezan. It symbolizes the contrast between suffering and peace, death and rebirth, and the worlds of hell and paradise.
The Osorezan Grand Festival and Itako Mediums
Connecting with the Spirits of Loved Ones
Every year from July 20 to 24, Osorezan hosts the Osorezan Grand Festival, one of the most important religious events at the sacred site. An autumn pilgrimage, known as Osorezan Aki-mairi, is also held later in the year, attracting worshippers from across Japan.
During these religious gatherings, visitors may encounter Itako, traditional female spiritual mediums associated with the Tohoku region. Through a practice known as kuchiyose, an Itako is traditionally believed to communicate messages from the spirits of deceased people.
For people mourning a family member or someone they deeply cared about, this practice has provided a way to feel connected with those who have passed away. Visitors gather quietly to listen, often with deep emotion, as the medium conveys words believed to come from their deceased loved ones.
The tradition of the Itako is an important part of the spiritual culture associated with Osorezan. Even for travelers who do not share these beliefs, witnessing the atmosphere of the pilgrimage can provide insight into the ways Japanese communities have traditionally understood death, mourning, and remembrance.
Volcanic Landscapes and Natural Hot Springs
A Sacred Place Shaped by Volcanic Activity
Osorezan is a volcanic landscape formed by eruptions more than 10,000 years ago. Even today, sulfurous steam and gases emerge from the ground, creating the distinctive landscape and atmosphere of the sacred site.
The volcanic activity has also produced natural hot springs. Within the temple grounds are four communal bathhouses where visitors can bathe free of charge. The mineral-rich water has a strong sulfur smell, and bathing has traditionally been regarded as a way to cleanse both body and mind.
For visitors staying overnight, the temple lodging facility Jishokaku offers an opportunity to experience Osorezan beyond a daytime visit. Guests can take part in practices such as morning prayers and sutra copying, experiencing the quiet atmosphere of the sacred mountain at a slower pace.
Lake Usoriyama: A Beautiful but Harsh Volcanic Lake
A Caldera Lake at the Heart of Osorezan
Lake Usoriyama lies at the center of the Osorezan caldera. The lake was formed when rainwater accumulated in a depression created by volcanic activity.
The lake water is strongly acidic because of hydrogen sulfide associated with the volcanic environment. Despite its harsh chemical conditions, the water is remarkably clear and can appear emerald green depending on the light.
Very few living organisms can survive in such an environment, although certain species, including small fish such as Japanese dace and blue damselflies, can occasionally be found around the lake.
The contrast between the beautiful water of Lake Usoriyama and the rugged volcanic landscape surrounding it is central to the character of Osorezan. The scenery seems almost unreal, reinforcing the mountain’s long-standing association with the boundary between this world and the next.
Osorezan: A Place to Reflect on Life and Death
Osorezan is a place where life and death, hell and paradise, nature and religious faith exist side by side. The volcanic landscape was shaped by powerful natural forces, while more than a thousand years of prayer and religious tradition have given the mountain its spiritual significance.
For many visitors, Osorezan is more than a sightseeing destination. The silence of the mountains, the smell of sulfur, the barren volcanic ground, the white sands of Paradise Beach, and the Buddhist memorial traditions invite visitors to reflect on mortality, loss, remembrance, and the meaning of life.
The traditional expression that people “go to Osorezan after they die” captures the special place the mountain holds in the imagination of the people of northern Japan. Here, visitors can remember those who have passed away while also taking time to look inward and consider their own lives.
Standing between the world of the living and the imagined world of the dead, Osorezan offers one of the most distinctive spiritual landscapes in Japan. Its unusual combination of sacred traditions, volcanic scenery, and profound tranquility makes it an unforgettable destination for travelers seeking to understand a deeper side of Japanese culture.