Oyamazumi Shrine Hokyoin-to: Three Granite Pagodas Whispering from the Kamakura Age
Tucked beside a quiet stream on the sacred island of Omishima in the Seto Inland Sea stands a trio of weathered granite pagodas that few first-time visitors expect to find. They are the Hokyoin-to of Oyamazumi Shrine, three Buddhist reliquary towers carved during the late Kamakura period and designated as Important Cultural Properties of Japan. Standing in a quiet line just beyond the southern corridor of the main shrine, they offer a moment of stillness amid one of Japan's most storied power spots, where samurai, sea lords, and emperors once came to pray for victory and safe passage. For travelers crossing the Shimanami Kaido on the way between Honshu and Shikoku, these stones reward those who pause and look closely.
What Are the Hokyoin-to?
A hokyoin-to is a distinctive form of Buddhist stone pagoda that takes its name from the Hokyoin Dharani Sutra, an esoteric scripture believed to deliver vast spiritual merit to anyone who built or worshipped before such a tower. Originally erected to enshrine copies of the sutra, hokyoin-to later came to serve as memorials and grave markers across Japan, flourishing especially from the Kamakura period through the Muromachi period. Their unmistakable silhouette—a square base supporting tiered "roof stones" crowned by a slender finial called a sorin, with four sharp prongs pointing outward at each corner of the cap—makes them instantly recognizable among Japan's many forms of stone pagoda.
The three pagodas at Oyamazumi Shrine are all carved from granite, and they sit close enough together that visitors can compare their proportions, weathering, and craftsmanship side by side. Together they form one of the finest groupings of medieval stone pagodas in Shikoku, and they speak quietly to the deep entanglement of Buddhist devotion and Shinto worship that shaped Japanese religious life long before the two traditions were administratively separated in the modern era.
Three Pagodas, Three Stories
The three towers are not identical. Each was built at a slightly different moment in the late Kamakura period, and each carries its own character.
The Central Pagoda
The central pagoda rises to roughly four meters, the tallest hokyoin-to in all of Shikoku. Its bold proportions and assured carving make it the visual anchor of the group. Tradition holds that it was raised to commemorate the visit of the wandering monk Ippen Shonin, founder of the Ji-shu sect of Pure Land Buddhism, who had close family ties to the island. The tower is believed to predate the year 1318 (Bunpo 2), making it the oldest documented hokyoin-to in Ehime Prefecture.
The Left Pagoda
The left pagoda stands about three meters high and bears the inscribed name of its mason, Nenshin, a stoneworker active in the port town of Onomichi on the opposite shore of the Seto Inland Sea. This single inscription transforms a quiet stone monument into precious historical evidence: it is the oldest stone tower in Ehime whose carver can be identified by name, and it documents the lively flow of craftspeople, materials, and ideas that linked the harbors of the Seto Inland Sea during the medieval era.
The Right Pagoda
The right pagoda, also around three meters tall, is generally regarded as the youngest of the three, dated to the latter half of the Kamakura period. Although the most modest in scale, it preserves the balanced proportions and refined detailing that mark the high point of medieval stone-carving traditions.
Why They Were Designated as Important Cultural Properties
The three hokyoin-to were designated Important Cultural Properties of Japan on November 22, 1952. Their value rests on several intertwined points. They are exceptionally early, dating from the closing decades of the Kamakura period (1275 to 1332). They are unusually well preserved for outdoor stone monuments more than seven hundred years old. The central pagoda is the largest of its kind in Shikoku, while the left tower carries an inscribed mason's name that anchors it to a specific workshop tradition rooted in Onomichi. Together they document the southern reach of a vibrant network of stoneworkers active across the Seto Inland Sea—the same network whose waters and trade routes would later give rise to the Murakami sea lords. Beyond their artistic merit, the pagodas embody the close interweaving of Buddhist memorial practice with the worship of one of Japan's most ancient and powerful Shinto deities, offering scholars a tangible window into the religious life of medieval Japan.
Highlights for the Visitor
The pagodas reward unhurried looking. To find them, leave the main hall through the southern corridor, cross the small Meiji-gawa stream, and follow the path toward the foot of the wooded slope. The stone trio appears beside the path on the way to the treasure museum. Visitors may notice how the granite has weathered into soft gray tones flecked with lichen, how each tier of "roof stone" has its own slight variation in proportion, and how the four corner prongs that crown each tower are still mostly intact despite centuries of typhoons and salt-laden sea winds. Early morning, when the camphor groves filter the light into pale green shafts, is one of the most atmospheric times to visit. In the rainy season the moss on the bases deepens to a vivid green, and on clear winter mornings the carved stone catches a soft golden light that flatters the worn edges of the relief work.
Around the Pagodas: What Else to See at Oyamazumi Shrine
Oyamazumi Shrine itself is one of the great spiritual destinations of western Japan. It is the head shrine of more than ten thousand Yamazumi and Mishima shrines across the country, and it has been revered for over a thousand years as a guardian of mountains, seas, and warriors. The grounds are dominated by a grove of towering camphor trees, including a great tree said to have been planted by the legendary ancestor Ochi-no-Mikoto and reckoned by some accounts to be more than two thousand years old. The Honden (Main Hall) and Haiden (Worship Hall), both Important Cultural Properties from the Muromachi period, anchor the inner precinct, while the towering 12-meter Somon main gate, rebuilt in cypress in 2010, marks the outer entrance.
Just steps from the pagodas, the shrine's three-building treasure museum complex—Shiyoden, the Kokuhokan (National Treasure Hall), and the Omishima Maritime Museum—houses one of Japan's most remarkable collections of arms and armor. The shrine is said to hold roughly forty percent of all suits of armor designated as National Treasures or Important Cultural Properties in Japan, including pieces associated with Minamoto no Yoritomo, Minamoto no Yoshitsune, and the Kawano clan from which Ippen Shonin descended.
Beyond the shrine, the island of Omishima itself invites slow exploration: a coastline of citrus orchards, the Toyo Ito Museum of Architecture, the small but surprising Tokoro Museum of contemporary sculpture, and quiet harbor villages where local fishermen still bring in the day's catch. The Shimanami Kaido cycling route passes nearby, and many travelers reach the island by bicycle from Onomichi or Imabari, pausing at the shrine before continuing across the next bridge.
- 📍 Plan Your Visit to Ehime
- Find tours, activities & transport passes near Oyamazumi Shrine Pagoda
- [ Dogo Onsen & Matsuyama Castle Relaxation Tour ]
Q&A
- Are the Hokyoin-to inside the shrine, and is there an admission fee to see them?
- The pagodas stand in the open air on shrine grounds, on the path between the main shrine and the treasure museum, and there is no separate fee to view them. Admission is charged only for the treasure museum buildings.
- When is the best time of day to photograph the pagodas?
- Early morning light filtering through the camphor grove is especially beautiful, while late afternoon side-light brings out the carving on the roof stones. Avoid harsh midday sun, which flattens the stone's surface texture.
- Who was Ippen Shonin, and what is his connection to the pagodas?
- Ippen Shonin (1239 to 1289) was the founder of the Ji-shu school of Pure Land Buddhism. He was born into the Kawano clan, the powerful family of Iyo Province that long worshipped Oyamazumi Shrine as their tutelary shrine, and he is recorded to have spent three days in retreat at the shrine in 1288. The central pagoda is traditionally said to commemorate his visit.
- How do I get to Oyamazumi Shrine from Hiroshima or Imabari?
- The shrine sits on Omishima Island along the Shimanami Kaido expressway connecting Onomichi in Hiroshima to Imabari in Ehime. By car it is roughly an hour from either side. Buses serve the island, and many cyclists ride in along the famous Shimanami cycling route, which has separate dedicated lanes.
- Should I visit the treasure museum as well?
- Yes, if your schedule allows. The museum complex holds one of the world's most concentrated collections of medieval Japanese arms and armor, including National Treasures, and viewing it together with the pagodas gives a rich sense of why warriors and rulers held this shrine in such high regard.
Basic Information
| Name | Oyamazumi Shrine Hokyoin-to (Three Pagodas) |
|---|---|
| Designation | Important Cultural Property of Japan (designated November 22, 1952) |
| Period | Late Kamakura period (1275 to 1332); central tower believed to predate 1318 |
| Material and Form | Granite, hokyoin-to (Buddhist reliquary pagoda); three pagodas, central tower approximately 4 meters tall, side towers approximately 3 meters each |
| Owner | Oyamazumi Shrine |
| Location | Miyaura, Omishima-cho, Imabari City, Ehime Prefecture |
| Access | Approximately 10 minutes by car from the Omishima IC on the Nishiseto Expressway (Shimanami Kaido); buses also run from Imabari and Onomichi |
| Viewing | Visible year-round in the shrine precinct; the adjacent treasure museum charges separate admission |
References
- Cultural Heritage Online (Bunka Isan Online): Oyamazumi Shrine Hokyoin-to (3)
- https://bunka.nii.ac.jp/heritages/detail/147088
- National Designated Cultural Properties Database (Agency for Cultural Affairs)
- https://kunishitei.bunka.go.jp/bsys/maindetails/102/3391
- Oyamazumi Shrine Official Website
- https://oomishimagu.jp/
- Imabari Tourism Association: Oyamazumi Shrine
- https://www.oideya.gr.jp/spot-c/ohyamazumi/
- Japan Heritage Portal: Cultural Properties of Oyamazumi Shrine
- https://japan-heritage.bunka.go.jp/ja/culturalproperties/result/2496/
- Wikipedia (Japanese): Oyamazumi Shrine
- https://ja.wikipedia.org/wiki/大山祇神社
Last verified: 2026.04.30