Emperor Gouda's Kanji (2 Chapters of the Shinguchi Decision

What This Cultural Property Is

The work consists of seven bound booklets in two related groups, together with two original wrapping papers (also brushed by the Emperor) preserved as attachments. The Siddham Inshin Kuketsu (悉曇印信口決, "Oral Transmissions on the Siddham Seal-Certificates") comprises two booklets recording teachings about the meaning, ritual significance, and proper use of inshin—the secret certificates of transmission that mark a disciple's reception of esoteric initiations. The Siddham Inshin Mon (悉曇印信文, "Texts of the Siddham Seal-Certificates") comprises five booklets containing the texts themselves.

What makes them remarkable is not just imperial provenance but content. They concern the Siddham script—an ancient Indic alphabet used in Japan to write the mantras and seed-syllables (bonji) of esoteric Buddhism. To possess and transmit knowledge of Siddham was, in the Shingon tradition, to hold a key to the Buddha's most intimate teaching.

The Author: An Emperor Who Became a Monk

Emperor Go-Uda (1267–1324) was the 91st sovereign of Japan, enthroned at the age of eight. After ruling and overseeing two periods of cloistered government, he took Buddhist vows in 1307 at the age of forty, adopting the dharma name Kongōshō. He then entered Daikaku-ji and became its 23rd head abbot, a position previously held by his grandfather and father. From this temple he continued to direct affairs of state, while devoting himself ever more deeply to Shingon esoteric practice.

Go-Uda is remembered as one of the finest calligrapher-emperors in Japanese history. His handwriting helped define the so-called shinkan-yō style—an elegant medieval mode of imperial brushwork that blended traditional Japanese aesthetics with the bold influence of Chinese Zen monk calligraphy. Four of his calligraphic works are designated National Treasures, and several more, including this set of manuscripts, are recognized as Important Cultural Properties.

Why This Work Was Designated an Important Cultural Property

The designation reflects three converging values. First, the documents are authenticated holographs (shinkan) of a reigning emperor, a category of artifact so rare from the medieval period that nearly every surviving example is nationally protected. Second, they sit at the heart of the esoteric Buddhist tradition Go-Uda revitalized at Daikaku-ji—the legacy of Kūkai, who first brought the Siddham script from Tang China to Japan in 806. Third, they preserve the personal voice of a sovereign as religious practitioner: not state pronouncements, but a learned monk-emperor's reflections on the script through which the buddhas were believed to speak.

Together with other Go-Uda manuscripts preserved at Daikaku-ji—such as the National Treasure Imperial Testament with Hand-Print and the Biography of Kōbō Daishi—these booklets form a precious documentary record of how one of Japan's most learned emperors approached the inner life of Shingon Buddhism.

Understanding the Siddham Script and Inshin Certificates

To appreciate these manuscripts, two concepts are key. The Siddham script (shittan 悉曇, also called bonji 梵字) is a descendant of the Brahmi alphabet of ancient India. Although it long ago disappeared in India, it has been preserved in Japan—largely thanks to the Shingon and Tendai traditions—as the sacred medium for writing mantras and the single-syllable seed letters (bīja) that represent buddhas, bodhisattvas, and wisdom deities. Each curving Siddham character carries meaning beyond its sound, and the careful copying of these letters is itself considered a meditative practice.

An inshin (印信) is a written certificate that masters issue to disciples to confirm that a particular initiation, mudra, or mantra has been correctly transmitted. In medieval Shingon, these certificates were treated as immensely sacred objects, often passed in strict lineages and stored as treasures of a temple's hōryū (法流, dharma stream). Go-Uda's booklets gather both the formal certificate texts and the oral explanations that accompanied them, preserved in his own brushwork.

Highlights and Points of Appreciation

For visitors fortunate enough to see these manuscripts during a special exhibition, several features deserve attention.

The brushwork itself is the first marvel. Go-Uda writes with the measured, dignified character of the shinkan-yō style—balanced, fluid, and deeply considered. Even within compact booklets meant for personal reference, his hand maintains a quiet authority that calligraphy specialists prize as a benchmark of the late Kamakura imperial style.

The interweaving of Chinese characters and Siddham letters offers a second dimension. Few Japanese emperors are known to have brushed Siddham at all; that Go-Uda did so demonstrates how seriously he committed himself to the inner curriculum of Shingon. The contrast between sinuous Indic letters and the firm strokes of Sino-Japanese script is visually striking.

The preserved wrapping papers, brushed by the Emperor and listed among the attachments, add a moving human dimension—evidence that these were objects of daily handling within the master's own quarters, not ceremonial display pieces.

Visiting Daikaku-ji Temple

Daikaku-ji is located in northern Sagano, a serene district at the western edge of Kyoto known for its bamboo groves, imperial villas, and the celebrated Ōsawa Pond. The temple traces its origins to the detached palace of Emperor Saga (early 9th century), and was formally converted into a temple in 876. Its formal name—Kyū-Saga Gosho Daikaku-ji Monzeki, or "Former Saga Imperial Palace, the Imperial Cloister Temple of Daikaku-ji"—reflects the centuries during which its abbots were drawn from the imperial family. Today it serves as the head temple of the Daikaku-ji school of Shingon Buddhism.

The temple precincts themselves are open daily and reward exploration. Visitors can pass through the Shinden (a designated Important Cultural Property originally part of an imperial residence), follow the famous Murasame-no-Rōka corridor, view the Five Wisdom Kings Hall (Godaidō), and reach the moon-viewing pavilion overlooking Ōsawa Pond. The Go-Kanmuri-no-Ma, where Emperor Go-Uda conducted cloistered government and where the reconciliation of the Northern and Southern Courts is said to have taken place, still preserves the atmosphere of imperial decision-making.

The Reihōkan (Treasure Hall) is where exceptional treasures such as these manuscripts may occasionally be displayed. The Reihōkan opens only for the spring and autumn special exhibitions, each running approximately two months, with rotating themes. The Siddham booklets are not part of the permanent rotation and are shown only on rare occasions—often during major Go-Uda-themed exhibitions or anniversaries. Visitors hoping to see them should check the temple's official exhibition schedule in advance, or watch for special exhibitions at the Kyoto National Museum and Tokyo National Museum, where Daikaku-ji treasures are sometimes loaned.

Surrounding Attractions

Daikaku-ji sits at the northern reach of one of Kyoto's most rewarding cultural landscapes. Ōsawa Pond, traditionally counted among the three great moon-viewing sites of Japan, lies just east of the temple and is encircled by walking paths lined with cherry trees, lotus, and seasonal blooms. Daikaku-ji's nearby temple Seiryō-ji—popularly called Saga Shakadō—houses a National Treasure standing image of Shakyamuni Buddha said to have arrived in Japan via India and China. Further south, the iconic Bamboo Grove of Sagano and the river vistas around the Togetsukyō Bridge in Arashiyama draw visitors all year. The Zen monastery of Tenryū-ji, a UNESCO World Heritage Site with one of Japan's finest landscape gardens, is also within easy reach.