Calligraphy by Mugaku Sogen: A Zen Master's Brushwork That Defied Mongol Swords

In the autumn of 1279, a Chinese Zen monk who had recently arrived in Japan composed a set of verses for a fellow disciple he had not seen in four decades. The monk was Mugaku Sogen (1226–1286), one of the most revered Zen masters of the Kamakura period. The calligraphy he brushed that day — an elegant gego (偈語, verse of spiritual teaching) addressed to Ichio Ingo of Choraku-ji Temple — would become one of Japan's designated National Treasures, treasured not only for its artistic mastery but for the extraordinary story of the man who created it.

Today, this remarkable work is owned by Shokoku-ji Temple in Kyoto and preserved at the Jotenkaku Museum, where it stands as a testament to the profound spiritual connections that linked Zen practitioners across China and Japan during the medieval era.

Who Was Mugaku Sogen?

Mugaku Sogen — known posthumously as Bukko Kokushi (仏光国師, "National Teacher of Buddha's Light") — was born in 1226 in Mingzhou (modern Zhejiang Province), China. He entered the priesthood at the age of thirteen and eventually studied under Wuzhun Shifan (known in Japanese as Bujun Shihan), one of the most prominent Rinzai Zen masters of the Southern Song dynasty. Under Wuzhun's guidance, Mugaku inherited the Dharma lineage that would shape Japanese Zen Buddhism for centuries to come.

Mugaku is perhaps best remembered for an extraordinary act of courage. In 1275, when Mongol soldiers invaded the temple where he was sheltering in Wenzhou, they surrounded the monks with drawn swords. Rather than flee, Mugaku calmly composed a poem — the famous "Rinken no Ju" (Poem at the Edge of the Blade) — expressing the emptiness of life and death. Awed by his fearless composure, the soldiers withdrew without harming anyone.

In 1279, at the invitation of Hojo Tokimune, the regent of the Kamakura shogunate, Mugaku sailed to Japan. He served as the third head priest of Kencho-ji Temple and later became the founding abbot of Engaku-ji Temple in Kamakura, profoundly influencing the development of Japanese Rinzai Zen Buddhism. His teaching style was known as "roba-zen" (old-woman Zen) for its warmth and accessibility, attracting many Kamakura warriors to the practice of meditation.

The Story Behind the Calligraphy

The full designation of this National Treasure is "Mugaku Sogen Bokuseki: Gego for Ichio of Choraku-ji Temple, dated the first day of the eleventh month, Koan 2 (1279)." The recipient, Ichio Ingo, was a Japanese monk who had traveled to Song dynasty China and studied under the same master, Wuzhun Shifan. Although they were Dharma brothers — fellow students of the same teacher — Mugaku and Ichio had never actually met during their years in China.

Approximately forty years later, fate brought them together in Japan. Ichio, who served as head priest of Choraku-ji Temple in Kozuke Province (modern Gunma Prefecture), sought out Mugaku after his arrival and became his disciple. The colophon (postscript) written on the third and fourth scrolls of this calligraphy tells this touching story of reunion and spiritual inheritance across decades and nations.

Mugaku composed this gego — a verse expressing Buddhist teachings in poetic form — and presented it to Ichio as a mark of their shared lineage and renewed bond. Written in the very year of Mugaku's arrival in Japan, the calligraphy captures a pivotal moment in the history of Zen transmission between China and Japan.

Why Is This Calligraphy a National Treasure?

Designated as a National Treasure on June 9, 1951, this calligraphy holds exceptional value for several reasons:

• Artistic excellence: Mugaku's calligraphy is written primarily in a refined running script (gyosho) that reflects the influence of the great Song dynasty calligrapher Huang Tingjian. Among Mugaku's surviving works, this piece is regarded as particularly outstanding for its dignified, powerful brushwork.
• Historical significance: Created in 1279, the same year Mugaku arrived in Japan, the work is a direct witness to one of the most important moments in the cross-cultural transmission of Zen Buddhism from China to Japan.
• Cultural context: The calligraphy embodies the bokuseki tradition — the calligraphic works of Zen monks that were treasured not merely as writing but as expressions of enlightened mind. Such works have been central to Japanese tea ceremony culture and Zen aesthetics for centuries.
• Rare survival: Originally a handscroll, the work has been remounted as four hanging scrolls (each approximately 31.5 cm × 86.5 cm). Despite the passage of more than seven centuries, the calligraphy remains in remarkable condition.

Highlights and What to Appreciate

When viewing this calligraphy, there are several aspects worth appreciating. The brushwork reveals a striking balance of strength and elegance. Each character flows naturally into the next with a rhythmic energy that suggests deep meditative concentration. The influence of Huang Tingjian's style — with its bold, elongated strokes and dynamic spatial composition — gives the work a visual grandeur that goes beyond mere handwriting.

The third and fourth scrolls, which contain the colophon, are particularly moving. Here, Mugaku describes his long-lost connection with Ichio and the remarkable circumstances that brought them together in Japan after four decades apart. This personal narrative transforms the calligraphy from a religious document into a deeply human story of friendship and spiritual kinship.

Visitors should also consider the extraordinary circumstances of Mugaku's life — his legendary composure before Mongol swords, his journey across the sea to a foreign land, and his role in shaping Japanese Zen Buddhism. All of this context enriches the experience of viewing the calligraphy and helps one appreciate the profound spirit behind each brushstroke.

Shokoku-ji Temple and the Jotenkaku Museum

The calligraphy is owned by Shokoku-ji Temple (formally known as Mannenzan Shokoku Joten Zenji), the head temple of the Shokoku-ji branch of Rinzai Zen Buddhism. Founded in 1392 by Ashikaga Yoshimitsu, the third shogun of the Muromachi shogunate, Shokoku-ji ranks second among the Five Great Zen Temples of Kyoto. The temple is also the administrative headquarters for Kinkaku-ji (the Golden Pavilion) and Ginkaku-ji (the Silver Pavilion), both of which are sub-temples in its network.

The calligraphy is preserved and periodically exhibited at the Jotenkaku Museum, located within the Shokoku-ji temple grounds. Established in 1984 to mark the 600th anniversary of the temple's founding, the museum houses a rich collection including five National Treasures and over 140 Important Cultural Properties. Its permanent displays include masterworks by the celebrated Edo-period painter Ito Jakuchu, and the museum regularly stages special exhibitions showcasing different aspects of its vast collection.

Please note that as this calligraphy is a delicate paper artwork, it is not on permanent display. It may be shown during special exhibitions, so visitors are encouraged to check the museum's exhibition schedule before visiting.

Nearby Attractions

Shokoku-ji Temple is situated in a wonderful location for exploring Kyoto's cultural heritage. The Kyoto Imperial Palace and its surrounding park are just a short walk to the south, offering beautiful seasonal scenery. Doshisha University, with its charming historic red-brick buildings, is directly adjacent to the temple grounds.

From Shokoku-ji, it is easy to reach other major destinations in Kyoto. Kinkaku-ji (the Golden Pavilion) and Ginkaku-ji (the Silver Pavilion), both sub-temples of Shokoku-ji, are accessible by bus. The vibrant Nishiki Market and the shopping streets of downtown Kyoto are a short subway ride away. For visitors interested in Zen culture, the nearby Daitoku-ji Temple complex offers another extraordinary collection of Zen art and garden landscapes.