Kobo Daishi's Three Writings (Fushincho)

Three Letters That Outlived Their Writer by Twelve Centuries

Inside the treasure hall of Tō-ji in southern Kyoto sits a handscroll a little over a meter and a half long, mounted with three short letters written by the monk Kūkai (774–835), who introduced esoteric Shingon Buddhism to Japan. The set is known as the Fūshinjō, a name taken from the first two characters of the opening letter, fūshin, meaning a message borne on the wind. The scroll measures 28.8 by 157.9 centimeters and carries the formal designation Kōbō Daishi hitsu sekitoku san tsū, "three letters by the brush of Kōbō Daishi," using the honorific title the imperial court granted Kūkai long after his death.

The recipient was Saichō (767–822), founder of the Tendai school on Mount Hiei and the other towering religious figure of the age. The two had crossed to Tang China in 804 aboard the same fleet of envoy ships and came home determined to renew Japanese Buddhism. These letters belong to the years around 810 to 812, when the friendship was still close and the two monks regularly lent each other texts. The first opens with thanks for a Tendai meditation treatise Saichō had sent, then asks him to come in person so they might discuss the teachings and pursue a shared aim.

One Scroll, Three Distinct Hands

Although mounted together, the three letters were written on separate occasions, and each reads differently under the brush. The first, the Fūshinjō proper, is the most disciplined, its characters upright and measured in a manner that looks back to the Chinese master Wang Xizhi. The second, sometimes called the Koppijō after its opening words, is heavy with ink and forceful, the strokes pressing hard into the paper. The third, the Kokkeijō, runs lighter and quicker, leaning into cursive script with an ease that feels almost conversational.

Kūkai had studied calligraphy directly in China, absorbing not only Wang Xizhi but the weightier, more muscular manner of the Tang calligrapher Yan Zhenqing. Scholars often point out how close the spirit of the Fūshinjō comes to Yan's famous draft elegy for his nephew. The result is a hand that holds refinement and raw strength in the same line. Tradition counts Kūkai among the Sanpitsu, the three finest brushes of the early Heian court, alongside Emperor Saga and the courtier Tachibana no Hayanari.

From Five Letters to Three

The collection was once larger. According to a colophon at the end of the scroll, five letters survived into later centuries before two were lost. One was stolen, said to have disappeared during the turbulent Nanbokuchō period in the fourteenth century. The other was cut from the scroll and presented in 1592 to the regent Toyotomi Hidetsugu, who had asked for it; that letter too is gone. Only three remain mounted in the scroll seen today.

The letters had been kept at Enryaku-ji, Saichō's temple on Mount Hiei, and passed to Tō-ji during the Nanbokuchō era. The deed of donation and its covering letter, two documents in all, were designated together with the scroll and form part of the National Treasure. The Agency for Cultural Affairs registered the work as a National Treasure on June 9, 1951, classifying it among ancient documents (komonjo) of the Heian period.

Why These Letters Matter

Their value runs along two lines at once. As calligraphy, the Fūshinjō is regarded as the high point of Kūkai's surviving brushwork and one of the supreme examples of the art in Japan; generations of students have copied it as a model. As a historical record, it captures the personal bond between the two men who shaped Heian Buddhism, in their own hands, on ordinary working days.

The warmth of that early friendship is worth dwelling on, because it did not last. Within a few years Kūkai and Saichō fell out, partly over the lending of esoteric texts and partly over a disciple who left Saichō to study under Kūkai. The Fūshinjō preserves the relationship at its most cordial, before the rift.

Seeing the Fūshinjō at Tō-ji

Tō-ji, formally Kyōōgokoku-ji, was founded in 796 as a state temple guarding the new capital and was granted to Kūkai by Emperor Saga in 823, becoming the headquarters of Shingon esoteric Buddhism. It joined the UNESCO World Heritage listing of historic Kyoto in 1994. The temple is best known for its five-story pagoda, at about 55 meters the tallest wooden tower in Japan, and for the hall of twenty-one sculptures arranged as a three-dimensional mandala.

The Fūshinjō itself lives in the treasure hall, the Hōmotsukan, a building that holds tens of thousands of objects from the temple's long history. Like most works on paper, the scroll is fragile and is not on permanent view. It appears only during the special exhibitions the treasure hall mounts in spring and autumn, and even then not in every year, so anyone hoping to see the original should check the current exhibition schedule before visiting. The grounds themselves are open daily, and the precinct can be reached on foot in about fifteen minutes from the Hachijō exit of Kyoto Station, or in roughly ten minutes from Tō-ji Station on the Kintetsu line.

If you come on the twenty-first of the month, you will find the grounds taken over by the Kōbō-ichi, a sprawling flea market held on the anniversary of Kūkai's death, where stalls sell antiques, crafts, plants, and street food. It is a good day to feel how alive the temple still is, even when the scroll stays in its case.