White Drawing on Paper of Acala and Two Children,

Shihon Hakubyō Fudō Myōō Nidōji Bishamonten Zuzō: An Esoteric Buddhist Iconographic Drawing of Mount Kōya

Tucked away in a quiet valley on the southern slope of Mount Kōya, the sacred mountain of Shingon Buddhism in Wakayama Prefecture, Entsū-ji Temple (also known as Entsū-ritsuji) preserves a remarkable treasure of medieval Buddhist art. The "Shihon Hakubyō Fudō Myōō Nidōji Bishamonten Zuzō" — a white-line ink drawing on paper depicting Fudō Myōō flanked by two attendant boys and the guardian deity Bishamonten — is designated as a Nationally Important Cultural Property of Japan. This rare iconographic drawing offers a glimpse into the world of esoteric Buddhist ritual practice that has flourished on Mount Kōya for over twelve centuries.

What Is a "Hakubyō" Iconographic Drawing?

The technique known as hakubyō (literally "white drawing") is a style of Japanese painting that relies almost entirely on fine ink lines drawn on paper, with little or no color. In esoteric Buddhism, hakubyō drawings — called zuzō — served as visual scriptures. They recorded the precise iconography of deities: their postures, attributes, hand gestures (mudrās), garments, and surrounding attendants. Master priests transmitted these drawings to their disciples, allowing the correct forms of the deities to be preserved across generations and reproduced in ritual paintings and sculpture.

Hakubyō zuzō are not simply preliminary sketches. They are works of devotional and scholarly importance in their own right, prized for their austere clarity, the confidence of their brushwork, and the sense of sanctity that comes from the fluent, unbroken ink line. The Entsū-ji drawing belongs to this rich tradition.

The Deities Depicted

The drawing portrays three figures central to esoteric Buddhist devotion, arranged together in a composition that is itself unusual.

Why This Drawing Was Designated an Important Cultural Property

The grouping of Fudō Myōō with attendants and Bishamonten in a single iconographic drawing is uncommon. Most surviving Fudō zuzō show the central deity alone or with the standard pair of attendant boys. The addition of Bishamonten suggests that this drawing was prepared for a specific ritual context, perhaps one that combined the protective functions of both deities.

Beyond its iconographic interest, the work is valued for the quality of its draftsmanship. The fluent, controlled ink lines reflect the hand of a skilled painter-priest (e-busshi) trained in the strict conventions of esoteric image-making. As a transmitted document of ritual iconography, it preserves visual knowledge that would otherwise be lost, and it stands among the artistic legacies of Mount Kōya's long history as a center of Shingon learning. These qualities — rarity of subject, refinement of execution, and historical importance as a document of esoteric practice — earned the work its national designation.

Entsū-ji and Mount Kōya: The Setting of the Treasure

Entsū-ji, often called Entsū-ritsuji, occupies a secluded valley south of the Renge-dani area on Mount Kōya. The temple is said to have been founded by Chisen Daitoku, one of the ten principal disciples of Kūkai (Kōbō Daishi), the founder of Mount Kōya. After centuries of decline, the temple was revived in the late 12th century by the celebrated priest Shunjōbō Chōgen — the same monk famed for raising funds to rebuild Tōdai-ji in Nara. It was again restored in the early Edo period and has since served as a strict practice and study hall for Shingon monks.

Today, Entsū-ji functions as a training temple for the highest levels of Shingon ritual practice. The grounds are not open to the general public, and the gates remain closed except for one annual occasion — the Hanazakari Festival on the eighth day of the fourth month of the lunar calendar — when visitors may enter. The "Shihon Hakubyō Fudō Myōō Nidōji Bishamonten Zuzō" is held in the temple's treasury and is not regularly displayed to visitors.

Highlights for the Cultural Traveler

Although the drawing itself cannot be readily viewed by tourists, its presence within this remote training temple deepens the sense of mystery and sanctity that surrounds Mount Kōya as a whole. Travelers interested in this work and its world can experience that atmosphere by visiting:

• The pathway through Renge-dani, the valley above which Entsū-ji sits — a quiet area of the mountain associated with medieval ascetic practice.
• Kongōbu-ji, the head temple of Shingon Buddhism, which administers Entsū-ji today.
• The Reihōkan Museum on Mount Kōya, which displays masterpieces of Buddhist painting and sculpture, including hakubyō drawings and Fudō Myōō imagery from various temples on the mountain.
• Okunoin and the Danjō Garan complex, the two great sacred precincts of Mount Kōya, where the religious life that produced works like the Entsū-ji drawing has continued without interruption since the ninth century.

Visiting Mount Kōya

Mount Kōya is part of the UNESCO World Heritage Site "Sacred Sites and Pilgrimage Routes in the Kii Mountain Range," inscribed in 2004. From Osaka, the mountaintop is reached via the Nankai Kōya Line to Gokurakubashi Station, followed by a cable car to Kōyasan Station, and a short bus ride into the temple town. The journey takes roughly two hours from central Osaka.

While Entsū-ji itself cannot be visited freely, the surrounding mountain offers more than 50 temples that welcome guests, and many provide overnight lodging (shukubō) where travelers can experience monastic vegetarian cuisine and morning rituals. The path leading toward Entsū-ji from the Kayadō bus stop passes through atmospheric cedar forest and past the boundary stones marking the temple's enclosure — a quiet pilgrimage even for those who cannot enter.

Nearby Attractions

Visitors to Mount Kōya can extend their cultural journey by exploring:

• Okunoin — the mausoleum of Kōbō Daishi, set within a vast forest cemetery of more than 200,000 monuments. The walk through the cedar avenues is one of the most moving experiences in Japan.
• Danjō Garan — the central religious complex of Mount Kōya, dominated by the vermilion Konpon Daitō (Great Stupa) and the Kondō main hall.
• Kongōbu-ji — the head temple, with elegant rock gardens and richly painted sliding doors.
• Myōō-in — home to the celebrated "Red Fudō" (Aka Fudō), one of Japan's three great Fudō paintings, designated as an Important Cultural Property.
• Reihōkan Museum — Mount Kōya's treasure museum, displaying rotating selections from the mountain's vast collection of national treasures and important cultural properties.
• Jison-in — at the foot of Mount Kōya, the women's worship hall historically used when women were forbidden from ascending the mountain.