The Origins of Kosaiji Temple
A Dream Seen by the Monk Sekiya
The origins of Kosaiji Temple are connected with a mysterious dream said to have been experienced by a Buddhist monk named Sekiya, who came from Satsuma and traveled throughout Japan during the early Kamakura period.
While passing through the village of Mushi, the monk stayed overnight in a small roadside Buddhist hall. During the night, he had a strange dream in which he witnessed a young woman named Myosei Shinnyo, who had died at the age of 17, being tormented by demons in hell.
The following day, Sekiya told the girl’s parents, the local lord Shiina Akino-kami and his wife, about the dream. Deeply regretting their own past actions and wishing for their daughter’s salvation, the couple decided to establish a temple.
The temple was completed in 1196 (Kenkyu 7). The girl’s posthumous Buddhist name, Myosei, was changed to Hirosei, and the temple was named Jishizan Jizoin Kosaiji.
The Legend of the Demon Masks
After the temple was established, a powerful thunderstorm is said to have struck the village of Mushi. According to local tradition, masks representing various demons—including blue, black, red, and white demons—fell from the sky into the temple grounds.
The blue and white masks were eventually lost, but the others were preserved at the temple.
Another legend tells of three Buddhist sculptors, Unkei, Tankei, and Anna-mi, who were living in Kamakura and are said to have experienced the same dream. They subsequently traveled to Mushi and created masks depicting the world of hell and the salvation of suffering beings by Bodhisattvas. The masks were presented to the temple and are traditionally regarded as the origin of the later Kiraiho performance.
Cultural Heritage of Kosaiji Temple
The Origin and Story of Kiraiho
Kiraiho is a Buddhist folk theater tradition passed down at Kosaiji Temple. It is considered unique in Japan for its dramatic depiction of the world of hell and the salvation offered by Bodhisattvas.
The performance was designated an Important Intangible Folk Cultural Property of Japan in 1976. It traditionally consisted of seven scenes depicting the judgment of the dead and the compassion of the Bodhisattvas.
Today, four scenes are performed:
- Daijo – The opening scene
- Sa no Kawara – The Children’s River in the afterlife
- Kama-ire – The Cauldron
- Shide no Yama – The Mountain of Death
Through these dramatic scenes, Kiraiho conveys Buddhist teachings concerning cause and effect, the consequences of one’s actions, compassion, and the salvation of living beings.
The Kiraiho Masks
Kosaiji Temple preserves 13 masks used in the Kiraiho performance. These masks were designated as Tangible Folk Cultural Properties of Chiba Prefecture in 2002.
The masks are important cultural artifacts that visually express the traditional Buddhist understanding of hell, demons, and the compassionate power of the Bodhisattvas.
Highlights of Kosaiji Temple
Main Hall and Sanmon Gate
The temple’s Sanmon gate features imposing statues of the Nio guardian figures, Agyo and Ungyo. Their powerful appearance creates a solemn atmosphere as visitors enter the temple grounds.
The main hall and other temple buildings provide an opportunity to appreciate the atmosphere of a traditional Buddhist temple while exploring the history of the local community.
Kiraiho Preservation Facility
Materials related to Kiraiho, including its traditional masks and historical records, are preserved in a dedicated Kiraiho storage facility at the temple.
The facility plays an important role in protecting and passing down this distinctive folk performance and its associated cultural heritage to future generations.
Festivals and Religious Traditions
Kiraiho on August 16
Kiraiho is traditionally performed every year on August 16, during the Bon season. Members of the local community take part in the performance, continuing a tradition that has been handed down through generations.
Lasting approximately 90 minutes, the performance presents dramatic scenes of the terrifying world of hell alongside the mercy and salvation of the Bodhisattvas.
Visitors attending the event can also receive a temple seal, or goshuin, featuring the words “Kiraiho”, providing a special memento of their visit.
Faith and Blessings
The principal object of worship at Kosaiji Temple is Jizo Bodhisattva. In Japanese Buddhist tradition, Jizo is regarded as a compassionate figure who protects and supports people suffering in the world.
At Kosaiji, worshippers traditionally pray for blessings such as good health, protection from illness, and abundant harvests.
Access to Kosaiji Temple
- On foot: Approximately 45 minutes from Yokoshiba Station on the JR Sobu Main Line.
A Temple Where History and Folk Culture Live On
Kosaiji Temple is a remarkable place where centuries of Buddhist faith, local history, legends, and traditional performing arts come together. Its long history dates back to the Kamakura period, while the unique Kiraiho tradition continues to preserve an extraordinary vision of hell and Buddhist salvation.
For travelers interested in Japanese Buddhism, traditional performing arts, folklore, history, and cultural heritage, Kosaiji Temple offers a fascinating opportunity to encounter a tradition rarely found elsewhere in Japan.