The Meaning and Purpose of Onbashira
The Onbashira Festival is held in the years of the Tiger and Monkey according to the traditional Japanese zodiac cycle. During the festival, enormous trees known as Onbashira are erected at the four corners of the main shrine buildings of Suwa Taisha.
Sixteen giant trees are selected and cut from the mountains. Four Onbashira are erected at each of the four main shrine complexes: Kamisha Honmiya, Kamisha Maemiya, Shimosha Akimiya, and Shimosha Harumiya.
The entire process, from cutting down the trees to transporting them and finally raising them at the shrines, has traditionally been carried out by local parishioners known as ujiko. This community participation is one of the defining characteristics of the festival.
A Festival Held Every Seven Years
Onbashira is often described as a festival held “once every seven years.” More precisely, it takes place once every six years, but Japanese traditional counting includes the starting year, making it the seventh year in the cycle.
The festival is broadly divided into two major stages: Yamadas hi, the “Mountain Pull,” held in April, and Satobiki, the “Village Pull,” held in May.
The entire Suwa region becomes deeply involved in the event. Some local businesses even arrange holidays around the festival, demonstrating how closely Onbashira is connected with community life.
Yamadas hi: Bringing the Sacred Trees Down from the Mountains
Kiotoshi — The Dramatic Log Slide
Yamadas hi is the stage during which the Onbashira trees are brought from the mountain forests toward the settlements. It contains some of the festival’s most dramatic and famous scenes.
The best known is Kiotoshi, or the “tree drop.” A massive Onbashira, with people riding on it, is sent sliding down a steep slope approximately 30 degrees in inclination and around 80 meters long.
The scene has traditionally been described as a ritual requiring people to risk their lives. As the huge tree begins its descent, riders and spectators experience the extraordinary combination of danger, excitement, and religious devotion that has made Onbashira famous throughout Japan.
Each Onbashira weighs approximately 10 to 15 tons. Large V-shaped wooden poles called medoteko are attached to the front and rear of the tree, and parishioners ride on these poles to help guide and control the massive log.
The sight of an enormous tree rushing down the Kiotoshi slope has become one of the defining images of spring in the Suwa region.
Kawagoshi — A Sacred Crossing of the River
Another important part of Yamadas hi is Kawagoshi, a ritual crossing of the Miyagawa River at Nakagawara in Chino City.
The Onbashira is pulled through the river’s cold snowmelt water as part of a purification ritual for the sacred tree. Parishioners dressed in white work together to pull the enormous timber through the water despite the harsh conditions.
The sight represents both devotion to the sacred tree and the strong bonds within the local community. For participants, Kawagoshi is not simply a physical challenge but an important religious and communal ceremony.
Satobiki — A Colorful Procession Through the Villages
After Yamadas hi comes Satobiki, during which the Onbashira are pulled from the storage area toward the shrine buildings.
The distance is approximately 2.5 kilometers to Kamisha Honmiya and 1.3 kilometers to Kamisha Maemiya. Unlike the dramatic mountain events, Satobiki has a festive and celebratory atmosphere.
The procession features traditional performances and ceremonies, including Hanagasa dances, Nagamochi-yakko processions, and mounted horsemen known as okiba.
Children and women from the local communities also participate, making Satobiki an occasion for people of all generations to express their pride in their hometown and their connection with Suwa Taisha.
The Ancient Origins of the Onbashira Tradition
A Tradition Rooted in Ancient Shinto Beliefs
The origins of the Onbashira Festival are traditionally traced back to a period before the Heian era. At Suwa Taisha, Takeminakata-no-Kami has long been worshipped as a deity associated with wind, water, agriculture, and hunting.
The Onbashira are regarded as yorishiro—sacred objects that serve as a temporary dwelling place or medium for a kami, or Shinto deity.
According to the Kojiki, one of Japan’s oldest surviving chronicles, Takeminakata-no-Kami resisted the envoy of Amaterasu during the transfer of sovereignty over the land of Izumo. The deity was eventually said to have retreated to Suwa, where he became the guardian deity of the region.
This mythology is closely connected with the ancient nature-based beliefs of the Suwa area and provides an important spiritual background to the Onbashira tradition.
Historical Records from the Medieval Period
The tradition of periodic shrine rebuilding is mentioned in historical records dating back many centuries. The Suwa Daimyojin Ekotoba, completed in 1356, contains a reference to shrine construction taking place in the years of the Tiger and Monkey.
The record suggests that a system of periodic shrine rebuilding was already established by the time of Emperor Kanmu during the Heian period. By the Kamakura period, the Suwa shrines had become an important religious center in Shinano Province, and records indicate that local estates and powerful families contributed to the construction of the Onbashira.
What Do the Onbashira Represent?
The Onbashira are far more than structural materials for a shrine. They carry a deep symbolic and religious meaning, although their precise origin and significance are interpreted in several different ways.
They have been understood as boundary pillars protecting a sacred space, sacred trees that calm and protect the land, yorishiro that provide a dwelling place for the kami, and even symbolic representations of a “world tree” connecting heaven and earth.
These interpretations are closely related to ancient Japanese beliefs in which sacred forces are present within the natural world. The use of enormous living trees as sacred symbols reflects the enduring relationship between nature, spirituality, and community in Suwa.
The People Who Support the Festival
Community Pride and the Role of the Ujiko
Onbashira is organized district by district throughout the Suwa region. Each community is assigned responsibility for particular Onbashira, and local parishioners take part in the many stages of the event.
Because cutting, pulling, transporting, and erecting the trees traditionally depend heavily on human effort, preparations require considerable time, organization, and physical work.
Volunteer groups known as Yamazukuri-shu play an important role in cutting the trees in the mountains. At Kamisha, the traditional site for cutting the Onbashira is Okoyayama in Tamagawa, Chino City.
The communities responsible for the individual Onbashira are selected by lottery. Being chosen is regarded as a major responsibility and a source of great local pride, with the role passed down through generations.
Onbashira Festival in the Modern Era
While the fundamental spirit of the festival continues, some aspects of Onbashira have changed in response to modern concerns such as safety and environmental protection.
During the 2022 Onbashira Festival, for example, the transportation of some trees by trailer was adopted because of the impact of the COVID-19 pandemic. Some traditional events, including Kiotoshi, were canceled.
Even when the form of the festival changes, its central idea of serving the kami and supporting the community continues to be maintained by the people of Suwa.
A Festival of Faith, Courage, and Community
The Onbashira Festival is more than a spectacular local celebration. It embodies reverence for nature, gratitude toward the kami, and the powerful bonds connecting generations within the Suwa community.
For years between festivals, local people continue to prepare for the next event, ensuring that knowledge, skills, rituals, and traditions are passed on to future generations.
When an enormous tree is pulled through the mountains, brought into the villages, and finally raised beside a shrine, the scene represents a tradition shaped by centuries of faith and community participation.
For travelers from overseas, Onbashira offers a rare opportunity to witness a living Japanese tradition in which nature, Shinto belief, physical courage, and local identity come together. Experiencing the festival provides a powerful insight into the cultural heritage of the Suwa region and the enduring relationship between people and the sacred natural world.