A Muromachi Pagoda on the Slope of Mount Tomiya
The Three-Storied Pagoda of Oyamaji (小山寺三重塔, Oyamaji Sanju-no-to, also written Oyama-ji) stands at Tomiya in Sakuragawa City, Ibaraki Prefecture, was erected in 1465, and was designated an Important Cultural Property in April 1906. It occupies a terrace partway up Mount Tomiya, a hill of about 365 meters on the northern flank of the Tsukuba range.
Oyamaji is a Tendai temple, its mountain name given as Shimuisan. Locally almost nobody calls it that. The name in use is Tomiya Kannon, after the Eleven-Headed Kannon enshrined in the main hall, and directions from anyone in the neighbourhood will come back in those terms.
The climb from the approach gate takes ten minutes or so on stone steps under old cedars. The pagoda appears without much warning, and its scale surprises people who were expecting something monumental. Three roofs of wooden shingle, three bays square at the base, a slender iron and bronze finial rising into the canopy. It is not a large building. It has been standing on this slope for five and a half centuries.
What the Finial Inscription Records
The Agency for Cultural Affairs lists the property as one pagoda, described in the technical formula as a three-bay three-storied stupa with a tochibuki roof, meaning thick split wooden shingles. The date given is Kansho 6, corresponding to 1465, in the middle of the Muromachi period. Designation as an Important Cultural Property was made on 14 April 1906 under designation number 00358, which places it among the earliest architectural designations in the country; at that time the category was styled a Specially Protected Building under the 1897 preservation law, and the temple still refers to the 1906 recognition in those older terms.
An inscription on the sorin, the metal finial crowning the roof, names the people responsible. Tagaya Tomotsune, lord of Shimotsuma, acted as chief patron. The construction was carried out by the master carpenter Soami Ieyoshi together with his eldest son. Named carpenters are uncommon in fifteenth-century provincial building records, and the survival of both patron and builder in a single inscription is part of why architectural historians value this pagoda beyond its regional rarity.
The design follows wayo, the indigenous style that had matured by the Heian period, with details drawn from zenshuyo, the Chinese-derived idiom that arrived with Zen Buddhism in the thirteenth century. That mixture was standard by the mid-Muromachi period, but the specific choices here are worth looking for: the openwork carving of the kaerumata, the frog-leg struts set between the bracket complexes, and the inverted-lotus finials on the newel posts of the railing around the interior altar platform.
Comparable pagodas of this date are almost absent in eastern Japan. The one usually cited alongside it is the three-storied pagoda of Saimyoji in Mashiko, Tochigi Prefecture, and the temple's own account describes the Oyamaji pagoda as the oldest of its type north of the Kanto plain. That claim rests on the surviving stock rather than on any complete record, so it is worth treating as a strong local tradition rather than a settled fact.
The 1336 Timber, and Visiting the Precinct
Between 1988 and 1991 the pagoda was taken apart and rebuilt in a full dismantling repair, the most invasive form of conservation Japanese timber architecture receives and the only one that lets conservators read every joint. During that work a piece of framing turned up carrying an ink inscription dated Engen 1, which corresponds to 1336. The temple takes this as evidence that a structure stood here before the Kansho rebuilding of 1465, and its own history speaks of an original pagoda going back to the Nara period. What the 1336 timber proves on its own is narrower: some material on this site predates the present building by well over a century, and the 1465 work was a reconstruction rather than a first erection.
The precinct holds a good deal besides the pagoda. The main hall, the gate with its guardian figures, and the bell tower are all designated at prefectural level, as are several sculptures including the seated Eleven-Headed Kannon. A cedar said to be more than seven hundred years old stands near the hall. Above the temple the hillside has been laid out as Tomiya Fureai Park, with a viewpoint at the summit looking over the old Iwase townscape toward the Nikko range on clear days.
The grounds are open for worship, and the pagoda is seen from outside; its interior is not normally accessible, so anyone hoping for a closer look should contact the temple in advance. Photography of the exterior is not restricted, though the surrounding trees crowd the building and finding a clear line takes patience. There is parking on the hill road above, and taxis run from JR Iwase Station on the Mito Line. Note that the walk down from the gate to the approach entrance takes about ten minutes, which matters if you have arranged a pickup. Late November into early December brings the autumn colour, and it is the busiest the site gets all year.
- 📍 Plan Your Visit to Ibaraki
- Find tours, activities & transport passes near Koyamadera Three-Storied Pagoda
- [ Hitachi Seaside Park Nemophila Flower Tours ]
Q&A
- When was the Three-Storied Pagoda of Oyamaji built, and who built it?
- It was erected in Kansho 6, corresponding to 1465, during the middle Muromachi period. An inscription on the metal finial records Tagaya Tomotsune, lord of Shimotsuma, as chief patron, with the master carpenter Soami Ieyoshi and his eldest son carrying out the work.
- Can visitors go inside the Three-Storied Pagoda of Oyamaji?
- The interior is not normally open. The pagoda is viewed from the precinct, which is accessible for worship, and exterior photography is unrestricted. Anyone hoping for interior access or a special viewing should enquire with the temple beforehand.
- How do I get to the Three-Storied Pagoda of Oyamaji?
- The temple is on the slope of Mount Tomiya in Sakuragawa City, reached by taxi from JR Iwase Station on the Mito Line. Drivers can use the parking area on the hill road. Allow about ten minutes on foot between the approach entrance and the gate, on stone steps.
- Why is the Three-Storied Pagoda of Oyamaji considered important?
- Muromachi-period pagodas are scarce in eastern Japan, and this one is usually paired with the Saimyoji pagoda in Mashiko as the only survivors of its date in the region. It also carries a finial inscription naming both patron and carpenter, which is unusual documentation for a fifteenth-century provincial building.
- What else can be seen at Oyamaji besides the Three-Storied Pagoda?
- The main hall, the guardian gate, and the bell tower are designated at prefectural level, along with several Buddhist sculptures including a seated Eleven-Headed Kannon. A cedar reputed to be over seven hundred years old stands in the precinct, and a hillside park above the temple has a summit viewpoint over the surrounding countryside.
Basic Information
| Name | Three-Storied Pagoda of Oyamaji (小山寺三重塔) |
|---|---|
| Location | Tomiya, Sakuragawa City, Ibaraki Prefecture |
| Designation | Important Cultural Property (Structure), designation no. 00358 |
| Year Designated | 14 April 1906 |
| Quantity | 1 pagoda |
| Dimensions | Three-bay three-storied stupa, wooden shingle roof; built Kansho 6 (1465) |
| Owner | Oyamaji temple |
| Public Access | Precinct open for worship; pagoda viewed from the exterior, interior not normally open |
References
- National Cultural Properties Database, Agency for Cultural Affairs: Three-Storied Pagoda of Oyamaji
- https://kunishitei.bunka.go.jp/heritage/detail/102/259
- Cultural Heritage Online: Three-Storied Pagoda of Oyamaji
- https://online.bunka.go.jp/heritages/detail/144325
- Sakuragawa City: Nationally Designated Cultural Properties, Three-Storied Pagoda of Oyamaji
- https://www.city.sakuragawa.lg.jp/education/bunkazai/city_bunkazai/kuni_bunkazai/page000490.html
- Tomiya Kannon Oyamaji: Guide to the Precinct
- https://oyamaji.sakura.ne.jp/contents/precincts/
- Ibaraki Prefecture Tourism Association: Tomiya Kannon Oyamaji
- https://www.ibarakiguide.jp/spot.php?mode=detail&code=719
Last verified: 2026.08.06