The Mahāvairocana Sutra and Its Companion Scrolls at Mount Kōya
Catalogued under the title of the Mahāvairocana Sutra, this Important Cultural Property is in fact a set of three handwritten scrolls held by Kōyasan Gakuen on Mount Kōya in Wakayama Prefecture. Together they gather the three foundational scriptures of esoteric Buddhism: the Mahāvairocana Sutra, known in Japan as the Dainichikyō; the Diamond Peak Sutra, the Kongōchōkyō; and the Susiddhikara Sutra, the Soshijikyō. These are the texts on which Shingon practice rests, copied out by hand long before the age of print.
The three scrolls came originally from the Buddhist canon kept at Kanshū-ji in Kyoto. None carries a colophon recording who copied it or when, so their dates have been read from the brushwork itself. The Mahāvairocana scroll is judged a copy of the late Nara period, the Diamond Peak scroll a work of the mid-Heian period, and the Susiddhikara scroll a copy from the middle of the Nara period. To hold them is to look at Buddhist scripture as it was transmitted across more than a thousand years.
Marks in the Margins, and Why They Matter
The deepest value of these scrolls lies in something easy to overlook: the small reading marks and notes added between the lines during the Heian period. Japanese readers of classical Chinese texts used a system of dots and signs, called kunten, to show how the characters should be parsed and pronounced in Japanese. Each set of marks belongs to a particular school and moment, and together they form a record of how the language was read.
On the Mahāvairocana scroll, the white marks are a variant of an early-Heian system associated with the Kitain hall of the southern capital, a rare type not previously documented. The red marks on the Diamond Peak scroll belong to a Ninna-ji tradition, some added around 1033. The Susiddhikara scroll carries seven different layers of marks, including those scratched in with a stylus, the earliest faint white notes and the latest red marks dated to 1108. For scholars of the history of the Japanese language, these annotations are a resource of the first order, which is much of why the scrolls were designated an Important Cultural Property on June 5, 1982.
Seeing Esoteric Texts on Mount Kōya
The scrolls are held by Kōyasan Gakuen, the educational foundation that runs Kōyasan University, and they are studied as much as they are displayed. As fragile written documents, they are not kept on regular public view, so a traveller should not expect to find them unrolled in a gallery. For visitors who want to understand the place of such texts in the life of the mountain, the Koyasan Reihōkan gathers the sutras, paintings, and ritual implements of Kōya and presents them on rotation through the year.
Mount Kōya itself is the wider context for these scriptures. Founded by Kūkai in the early ninth century as the centre of Shingon Buddhism in Japan, the mountain remains a living monastic town, reached from Osaka by the Nankai line and a cable car to the plateau. To walk among its temples is to move through the world in which texts like these were copied, read, and handed down.
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Q&A
- What are these three scrolls?
- They are handwritten copies of the three core scriptures of esoteric Buddhism: the Mahāvairocana Sutra (Dainichikyō), the Diamond Peak Sutra (Kongōchōkyō), and the Susiddhikara Sutra (Soshijikyō). The designation is catalogued under the title of the first of the three.
- How old are they?
- None bears a colophon, so the dates rest on analysis of the brushwork. The scrolls are judged to range from the middle and late Nara period to the mid-Heian period, making them among the older surviving copies of these scriptures.
- What are kunten reading marks?
- Kunten are dots and signs that Japanese readers added to classical Chinese texts to show how to parse and pronounce them in Japanese. Different schools used different systems, so the marks reveal how the language was read at a given time and place.
- Why are the marks considered valuable?
- Several of the systems on these scrolls are rare or previously undocumented, and they can be dated to specific periods. As evidence for the history of the Japanese language, they are a resource of unusual importance, which weighed heavily in the decision to designate the scrolls.
- Can I see the scrolls?
- They are held by Kōyasan Gakuen as study materials and are not on regular display. To encounter Mount Kōya's written and pictorial treasures, visit the Koyasan Reihōkan, which rotates the mountain's sutras and artworks through its galleries.
Basic Information
| Name | Mahāvairocana Sutra (with the Diamond Peak and Susiddhikara Sutras) |
|---|---|
| Location | 132 Kōyasan, Kōya-chō, Ito-gun, Wakayama Prefecture |
| Designation | Important Cultural Property (calligraphy and texts), designated 5 June 1982 |
| Format | Three scrolls, handwritten |
| Period | Nara to Heian period |
| Owner | Kōyasan Gakuen |
| Access | Held as study materials and not on regular display; Mount Kōya's treasures can be seen on rotation at the Koyasan Reihōkan |
References
- National Database of Designated Cultural Properties, Agency for Cultural Affairs
- https://kunishitei.bunka.go.jp/bsys/maindetails/201/8884
- Cultural Heritage Online, Agency for Cultural Affairs (Dainichikyō)
- https://online.bunka.go.jp/heritages/detail/563452
- Koyasan Reihōkan, Collection
- https://reihokan.or.jp/syuzohin/
Last verified: 2026.06.23