A Bell Wrapped in Sanskrit at Kongo Sanmaiin
Most temple bells in Japan are read by their sound. This one is read by its surface. The bronze bell at Kongo Sanmaiin, a sub-temple on the mountaintop monastic town of Koyasan in Wakayama Prefecture, carries an inscription that dates its casting to the eleventh month of Jogen 4, the year 1210. It stands just under a meter tall, 95.8 centimeters measured to the top of the ryuzu, the dragon-shaped loop from which a temple bell is hung.
Koyasan has been the heart of Shingon esoteric Buddhism since the priest Kukai opened it in the early ninth century. Kongo Sanmaiin sits in the quieter southern part of the town, set back from the main street. The temple was founded in 1211 by Hojo Masako, widow of the shogun Minamoto no Yoritomo, to pray for his repose, and it kept close ties with the Kamakura military government for generations. The bell's inscribed date falls a year before that founding, and exactly how it came to hang at the temple is not recorded.
Why It Matters
What sets this bell apart is everything written on it. Instead of the plain bands and lotus striking-pads of an ordinary temple bell, its body is ringed with sacred text: the names of Shaka, the historical Buddha; Yakushi, the Buddha of healing; the Amida triad; the bodhisattva Jizo; and the wrathful guardian Fudo, together with nine bonji, the Siddham Sanskrit letters that esoteric Buddhism uses to stand for deities and their mantras.
Bells carrying mantra inscriptions of this kind are unusual. The characters were cast directly into the bronze, not cut in afterward, and they read clearly even now. That clarity is why the bell is valued as a document as much as an object, useful to scholars of medieval epigraphy and to historians tracing how Shingon ritual was practiced in the early thirteenth century. The Agency for Cultural Affairs designated it an Important Cultural Property on August 25, 1925.
What to Look For
The bell hangs in the temple's gate-tower, a structure rebuilt in the Bunsei era between 1818 and 1831. A horizontal plaque above it reads Bichoson, the name of a tengu, the long-nosed mountain spirit that local tradition credits with guarding Koyasan against fire. The bell is no longer struck, so a visit means looking rather than listening. Circle the tower slowly and the cast Sanskrit comes into view band by band, the letters raised in low relief.
There is good reason to linger on the grounds. Kongo Sanmaiin is the only sub-temple on Koyasan inscribed as part of the UNESCO World Heritage listing "Sacred Sites and Pilgrimage Routes in the Kii Mountain Range." Its courtyard holds a National Treasure tahoto, a two-tiered pagoda built in 1223 that ranks among the oldest of its form in Japan, and in late spring the precinct fills with rhododendron blossom from shrubs said to be centuries old. The temple still operates as a shukubo, a working pilgrim lodging, and opens its grounds mainly to overnight guests and to visitors attending memorial services, so it is worth confirming access and any special viewing before you go.
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Q&A
- When was the bell made?
- Its own inscription gives the date as the eleventh month of Jogen 4, which corresponds to 1210, in the Kamakura period.
- What is written on it?
- The cast names of Shaka, Yakushi, the Amida triad, Jizo and Fudo, along with nine Sanskrit bonji letters that represent esoteric mantras. Such inscribed bells are rare.
- Can I hear it rung?
- No. The bell is preserved and no longer struck. It can be viewed in the gate-tower but is not sounded.
- Where is it kept?
- In the gate-tower of Kongo Sanmaiin, in the southern part of Koyasan, Koya-cho, Ito District, Wakayama Prefecture.
- How do I reach Koyasan?
- From Osaka, ride the Nankai Koya Line to Gokurakubashi, take the cable car up to Koyasan Station, then a Nankai Rinkan bus into town. Kongo Sanmaiin is a short walk from the Senjuinbashi stop.
Basic Information
| Name | Bronze Bell (with inscriptions dated the eleventh month of Jogen 4) |
|---|---|
| Location | Kongo Sanmaiin, Koyasan, Koya-cho, Ito District, Wakayama Prefecture |
| Designation | Important Cultural Property (designated August 25, 1925) |
| Category | Craft work |
| Quantity | One bell |
| Dimensions | Height 95.8 cm including the ryuzu (suspension loop) |
| Period | Kamakura period, inscribed date 1210 |
| Owner | Kongo Sanmaiin |
| Access | Hangs in the gate-tower; no longer rung. Grounds open mainly to lodging guests and memorial-service visitors. Confirm in advance. |
References
- Database of National Cultural Properties, Agency for Cultural Affairs
- https://kunishitei.bunka.go.jp/bsys/maindetails/201/5441
- Kongo Sanmaiin, official site
- https://www.kongosanmaiin.or.jp/
- Wakayama World Heritage Centre, Kongo Sanmaiin district
- https://www.sekaiisan-wakayama.jp/know/koyasan/kongozanmai-in.html
Last verified: 2026.06.22