Bokuseki of Mi'an Xiangjie — The Only Surviving Calligraphy by a Great Song Dynasty Zen Master

In the quiet precincts of Daitoku-ji temple in northern Kyoto, hidden within a sub-temple that has never opened its doors to the general public, hangs one of Japan's most treasured cultural properties. The bokuseki (ink calligraphy) of Mi'an Xiangjie — known in Japanese as Mittan Kanketsu — is the sole surviving work of handwriting by this towering figure of Southern Song dynasty Chan (Zen) Buddhism. Written on fine twilled silk in the mid-autumn of 1179, this Dharma discourse (hōgo) has been revered for over eight centuries by Zen monks and tea masters alike, and it stands as a profound bridge between Chinese Zen spirituality and Japanese cultural tradition.

Who Was Mi'an Xiangjie?

Mi'an Xiangjie (1118–1186) was one of the most distinguished Chan Buddhist masters of China's Southern Song dynasty. Born in Fuzhou, Fujian Province, he belonged to the Rinzai (Linji) school's Yōgi (Yangqi) lineage and was the Dharma heir of Yingan Tanhua. During his career, Mi'an served as abbot of some of China's most prestigious Zen monasteries, including the famed Jingshan Wanshou Temple and Lingyin Temple in Hangzhou. In his later years, he retired to Tianlong Mountain in Siming, where he passed away in 1186.

Mi'an's teachings profoundly influenced the development of Rinzai Zen in both China and Japan. His lineage continued through generations of distinguished masters, and his reputation as a great Zen patriarch made any surviving trace of his hand an object of extraordinary reverence. The fact that only this single calligraphic work survives today makes it all the more precious.

The Calligraphy: A Dharma Discourse on Twilled Silk

The formal designation of this National Treasure is "Bokuseki of Mi'an Xiangjie: Hōgo (Dharma Discourse on Twilled Silk), dated mid-autumn of the ji-hai year of Chunxi" — referring to the sixth year of the Chunxi era, or 1179 CE. The calligraphy was written as a hōgo, a type of Zen teaching text that conveys essential Buddhist principles and guidance for spiritual practice.

Mi'an addressed this particular discourse to a practitioner known as "Shō Zennin" (Master Shō), instructing him in the core principles of Zen training. The text encourages perseverance in meditation practice, teaching that those who dedicate themselves wholeheartedly to their training will one day reach a spiritual realm beyond anything they could have imagined even in their dreams. This message, directed broadly at all Zen practitioners, carries immense significance within the Rinzai tradition.

What makes this work visually distinctive is its unusually large format, written with bold, vigorous brushstrokes on aya — a type of fine twilled silk fabric. The confident, dynamic quality of the calligraphy reflects the spiritual authority and clarity of mind that characterized great Zen masters. In the tradition of bokuseki, it is not technical perfection that is prized, but rather the direct expression of an awakened mind through the movement of brush and ink.

Why Was It Designated a National Treasure?

The bokuseki of Mi'an Xiangjie was designated a National Treasure of Japan on June 9, 1951. Several factors contributed to this exceptional recognition:

• It is believed to be the only surviving calligraphic work by Mi'an Xiangjie, one of Southern Song China's greatest Zen masters. Among all Chinese Zen monk calligraphy preserved in Japan, it is considered one of the most renowned.
• Its content — a Dharma discourse on the essentials of Zen practice — holds profound religious and philosophical significance within the Rinzai Zen tradition.
• The calligraphy has been continuously venerated by both Zen institutions and tea masters since its arrival in Japan, demonstrating an unbroken chain of cultural and spiritual appreciation.
• An accompanying letter by the legendary tea master Sen no Rikyū (1522–1591) is designated alongside it as an "attached" treasure. Rikyū personally created the scroll's mounting, further connecting this masterpiece to the highest levels of Japanese tea culture.

The Mittan-seki Tea Room — A National Treasure Built for One Scroll

Perhaps the most remarkable testament to the reverence this calligraphy commands is the tea room that was created specifically to house it. Within the shoin (study hall) of Ryōkōin temple, a special tea room called the Mittan-seki ("Mittan Alcove Room") was constructed, featuring a dedicated display alcove known as the Mittan-doko — designed exclusively for hanging this single scroll.

The Mittan-seki is attributed to the renowned tea master and feudal lord Kobori Enshū (1579–1647). It is a four-and-a-half tatami mat room with a daime preparation area, designed in the shoin-zukuri (study hall) architectural style rather than the rustic sōan style favored by Rikyū. The room features an elegant staggered shelf arrangement known as the "Ryōkōin-dana," ink wash paintings on stretched paper walls, and pillars that artfully mix round logs, square timber, and bark-edged posts.

The Ryōkōin Shoin, which includes the Mittan-seki tea room, was itself designated a National Treasure in 1961, making it one of only three National Treasure tea rooms in Japan alongside the Tai-an at Myōkian temple and the Jo-an in Aichi Prefecture. Remarkably, the Mittan-seki is often called "the most difficult National Treasure building to see," as Ryōkōin has maintained a strict no-visitor policy and does not participate in special public openings.

Sen no Rikyū and the Art of Mounting

The connection between this bokuseki and Sen no Rikyū — the most influential figure in the history of Japanese tea ceremony — adds another extraordinary layer to its significance. Rikyū created the hyōgu (scroll mounting) for the calligraphy, and an accompanying letter written by Rikyū to Yamanoue Sōji (also known by his tea name Hyōan) discusses the details of this mounting work. In the letter, Rikyū mentions that the mounting was hastily prepared during rainy weather and notes that any warping should be corrected.

This letter has been preserved together with the bokuseki and is designated as an "attached" cultural property. The fact that Japan's greatest tea master personally handled the presentation of this scroll underscores the supreme position the bokuseki held in the hierarchy of tea ceremony treasures.

Ryōkōin Temple — A Treasury of National Treasures

Ryōkōin is a sub-temple (tacchū) of Daitoku-ji, the great Rinzai Zen monastery in Kyoto's Murasakino district. It was founded in 1606 by Kuroda Nagamasa, the first lord of the Chikuzen Fukuoka domain, in memory of his father Kuroda Yoshitaka (Kanbei/Josui), the celebrated strategist of the Sengoku period.

The temple's founding abbot was Shun'oku Sōen, but its effective founder and the figure who shaped its character was Kōgetsu Sōgan (1574–1643), the son of the wealthy Sakai merchant and tea master Tsuda Sōgyū. Through Kōgetsu's connections, Ryōkōin became a gathering place for the cultural luminaries of the Kan'ei era, including Kobori Enshū, Prince Hachijō-no-miya Toshihito, and the calligrapher-monk Shōkadō Shōjō.

In addition to the bokuseki of Mi'an Xiangjie and the Mittan-seki tea room, Ryōkōin houses one of only three yōhen tenmoku (kiln-changed) tea bowls designated as National Treasures — making this small, completely closed temple home to an astonishing concentration of Japan's finest cultural properties.

Visiting and Viewing Opportunities

Ryōkōin maintains a strict policy of refusing all visitors, and unlike many other sub-temples of Daitoku-ji, it does not participate in seasonal special openings. This makes the bokuseki and the Mittan-seki tea room among the most elusive of all Japan's National Treasures.

However, on extremely rare occasions, the bokuseki and other Ryōkōin treasures have been exhibited at museums. Notable exhibitions include the MIHO Museum's "Daitoku-ji Ryōkōin: National Treasure Yōhen Tenmoku and Hasōai" in spring 2019, and the Tokyo National Museum's "Chanoyu" exhibition in 2017. Visitors interested in seeing this masterpiece should watch for announcements from major Japanese museums.

While the bokuseki itself may be difficult to view in person, the broader Daitoku-ji complex offers a rich experience of Zen culture. Several sub-temples are open to the public, including Ryōgen-in, Zuihō-in, Daisen-in, and Kōtō-in (though some may be temporarily closed for restoration). These temples feature exquisite karesansui (dry landscape) gardens, historic architecture, and atmospheres steeped in Zen spirituality.

Nearby Attractions

The Daitoku-ji area in Kyoto's Kita-ku ward is rich in cultural and spiritual experiences. Adjacent to the temple complex is Imamiya Shrine, famous for its atmospheric approach lined with shops selling aburimochi — small pieces of charcoal-grilled rice cake dipped in sweet miso paste, a local delicacy enjoyed for centuries. The Kamigamo Shrine (Kamo-wakeikazuchi Shrine), a UNESCO World Heritage Site, is located nearby to the northeast. The traditional weaving district of Nishijin, with its historic townhouses and textile traditions, lies to the south. For those interested in extending their cultural explorations, the Kinkaku-ji (Golden Pavilion) and Kitano Tenmangu Shrine are also within easy reach by bus.