Misasa Shinkan

Sanchō Shinkan: National Treasure Autograph Letters of Three Emperors at the Sonkeikaku Bunko

Among the countless written treasures surviving from medieval Japan, few assemblages capture the turbulent spirit of an age as vividly as the Sanchō Shinkan (三朝宸翰), literally the "Imperial Autographs of Three Reigns." Preserved at the Sonkeikaku Bunko, the library of the former Kaga-Maeda clan now administered by the Maeda Ikutokukai in Komaba, Tokyo, this designated National Treasure gathers personal letters brushed by three emperors who lived through one of the most volatile chapters of Japanese history: Emperor Fushimi, Emperor Hanazono, and Emperor Go-Daigo.

These were not official edicts written by scribes. They are intimate communications — the private ink of sovereigns speaking in their own hand about poetry, politics, family, loss, and, in the end, the collapse of an era. For visitors curious about the meeting point of calligraphy, imperial history, and personal biography, few objects in Japan offer a more moving encounter.

What the Sanchō Shinkan Preserves

The compound title Sanchō Shinkan is a Japanese convention referring to three sovereigns collectively. Shinkan (宸翰) is the formal term for any document written in an emperor's own hand, distinguished from letters drafted by attendants and simply sealed or approved. Because few autograph imperial documents from before the Edo period survive, nearly all pre-modern shinkan are designated as National Treasures or Important Cultural Properties.

The three figures gathered in this collection reigned in overlapping but politically divided circumstances during the late Kamakura and early Nanboku-chō periods:

• Emperor Fushimi (1265–1317), the 92nd emperor, of the Jimyōin-tō (Northern) line and founder of the influential "Fushimi-in" calligraphic style
• Emperor Hanazono (1297–1348), the 95th emperor, Fushimi's son, a cultured scholar-ruler who later became a Zen monk and whose residence evolved into Myōshin-ji temple
• Emperor Go-Daigo (1288–1339), the 96th emperor, of the rival Daikakuji-tō (Southern) line, who toppled the Kamakura shogunate and attempted the Kenmu Restoration

The set includes ten autograph letters of Emperor Go-Daigo alongside correspondence from Fushimi and Hanazono. Designated a National Treasure under the current Cultural Properties Protection Law in 1951, it is held in Tokyo at the Sonkeikaku Bunko, the private research library of the Maeda family that also houses treasures such as the oldest extant manuscript of the Nihon Shoki and Fujiwara no Teika's autograph copy of the Tosa Nikki.

Why the Collection Is Designated a National Treasure

The Sanchō Shinkan stands at a rare intersection of paleographic rarity, historical significance, and artistic excellence — three criteria that together place it among the most esteemed documents in Japan.

Highlights and Points of Appreciation

Visitor Information: How to Encounter the Sanchō Shinkan

Because the Sanchō Shinkan is preserved for conservation reasons and the Sonkeikaku Bunko operates as a research facility, the collection is not open to the general public on a walk-in basis. The library itself, located adjacent to Komaba Park in Meguro, Tokyo, limits its reading-room access to credentialed academic researchers.

Travelers wishing to encounter the imperial autograph collections of the Maeda family should plan around special exhibitions, which occur periodically at several venues:

• The Ishikawa Prefectural Museum of Art in Kanazawa maintains a dedicated Maeda Ikutokukai Sonkeikaku Bunko annex where works from the collection are displayed in rotation
• Major national museums — notably the Tokyo National Museum and the Kyoto National Museum — occasionally borrow these treasures for special calligraphy or imperial-history exhibitions
• The Seisonkaku villa next to Kenroku-en in Kanazawa also hosts selected pieces from the Maeda legacy

Always check each institution's current exhibition calendar before visiting, as rotation schedules for fragile paper treasures are strict and individual works may be on display for only a few weeks at a time.

Surrounding Attractions

The Sonkeikaku Bunko sits within a quietly historic district of Tokyo that rewards unhurried exploration. Komaba Park itself preserves the former Maeda marquis's residence, whose Western-style and Japanese-style buildings are both designated Important Cultural Properties and open to the public free of charge. Visitors can tour the elegant 1929 Western mansion and the 1930 Japanese wing to see how the family lived during the early Shōwa era.

A short walk leads to the Japan Folk Crafts Museum (Nihon Mingeikan), founded by the philosopher Yanagi Sōetsu and dedicated to the everyday beauty of traditional Japanese crafts. Shibuya's bustling neighborhoods, as well as the university town atmosphere around the University of Tokyo's Komaba campus, are all within comfortable walking distance. Those with a deeper interest in the Maeda family's artistic legacy can continue their journey to Kanazawa, where the Ishikawa Prefectural Museum of Art, Seisonkaku villa, and the celebrated Kenroku-en garden together complete the picture.