Portrait of Kanazawa Sadamasa, Colour on Silk

Portrait of Kanazawa Sadamasa on Silk: A National Treasure Window into the Kamakura Warrior Soul

Tucked away in the quiet precincts of Shōmyōji Temple in Yokohama's Kanazawa Ward lies a painting that has survived nearly seven centuries of Japanese history. The Kenpon Chakushoku Kanazawa Sadamasa-zō (絹本著色金沢貞将像), or "Portrait of Kanazawa Sadamasa on Silk," is one of four National Treasure portraits collectively known as the "Four Generals' Portraits" (Shishō-zō, 四将像). These extraordinary works capture the faces of four generations of the Kanazawa Hōjō clan — powerful warrior-statesmen who helped govern medieval Japan — and stand among the finest examples of Kamakura-period portraiture in existence.

What Is the Portrait of Kanazawa Sadamasa?

This painting is a formal portrait rendered on silk using mineral pigments, a technique described in Japanese as kenpon chakushoku (絹本著色). It depicts Kanazawa Sadamasa (also known as Hōjō Sadayuki, 北条貞将), the fourth-generation head of the Kanazawa branch of the Hōjō clan. Sadamasa is shown wearing an eboshi (a tall, lacquered headpiece) and kariginu (a hunting robe traditionally worn by aristocrats and senior warriors), reflecting his secular role as a powerful military leader rather than a monk.

The portrait measures approximately 100 cm in height and 60 cm in width, and is mounted as a hanging scroll (kakejiku). Although the silk has darkened to a deep, aged brown over the centuries, the delicate brushwork that defines Sadamasa's face remains remarkably expressive — a testament to the extraordinary skill of the anonymous artist who painted it during the subject's own lifetime.

The Kanazawa Hōjō Clan: Warriors, Scholars, and Patrons of Culture

To appreciate this portrait fully, one must understand the remarkable family it represents. The Kanazawa Hōjō clan traced its origins to Hōjō Yoshitoki, the second shikken (regent) of the Kamakura shogunate. Yoshitoki's grandson, Hōjō Sanetoki (1224–1276), established the branch in the Kanazawa district of what is now Yokohama. Sanetoki was no ordinary warrior: he was a devoted scholar who founded Kanazawa Bunko, Japan's oldest known samurai library, and established Shōmyōji Temple as the family's Buddhist sanctuary.

The clan's cultural and political influence grew over four generations. Sanetoki's son Akitoki expanded the library's collection. Akitoki's son Sadaaki (Kanazawa Sadaaki) served as the 15th shikken and spent years in Kyoto cultivating relationships with the imperial court. And Sadaaki's son, the subject of this portrait — Kanazawa Sadamasa — carried on the family's legacy of service until the very end of the Kamakura shogunate in 1333.

Kanazawa Sadamasa: The Last Defender of the Shogunate

Kanazawa Sadamasa (estimated birth: 1302; death: July 4, 1333) lived during one of the most turbulent periods in Japanese history. He rose through the ranks of the shogunate's administration, serving as a member of the hyōjōshū (council of state) and later as the Rokuhara Tandai (Southern), the shogunate's chief representative in Kyoto, from 1324 to 1330. In this role, he commanded an unprecedented force of 5,000 mounted warriors — a reflection of the growing threat posed by Emperor Go-Daigo's attempts to overthrow the military government.

When Nitta Yoshisada's forces besieged Kamakura in May 1333, Sadamasa fought desperately to defend the city. After fierce fighting at Kobukurozaka — one of the seven mountain passes that guarded Kamakura — he retreated to Tōshōji Temple with just 800 surviving retainers, bearing wounds in seven places. According to the Taiheiki, a celebrated medieval war chronicle, the regent Hōjō Takatoki honored Sadamasa's loyalty by appointing him to the highest office — possibly making him the 17th and final shikken of the Kamakura shogunate. Sadamasa is said to have written on the back of his letter of appointment: "I cast aside a hundred years of life to repay the grace of a single day." He then rode out for a final battle and perished alongside his father and the rest of the Hōjō clan.

Why Was This Portrait Designated a National Treasure?

The Portrait of Kanazawa Sadamasa was first recognized as an Important Cultural Property in 1900 and elevated to National Treasure status on June 11, 1966. Several factors make it exceptionally valuable.

First, it belongs to the "Four Generals' Portraits," a set of paintings depicting four successive heads of the Kanazawa Hōjō clan: Hōjō Sanetoki, Hōjō Akitoki, Kanazawa Sadaaki, and Kanazawa Sadamasa. It is extraordinarily rare to possess a continuous visual record of four generations of the same medieval warrior family, making this set invaluable for both art history and cultural history.

Second, each portrait was painted close to its subject's own lifetime, using the nise-e (似絵, "likeness painting") technique — a revolutionary approach to portraiture that emerged in the Kamakura period. Unlike earlier Japanese paintings, which focused almost exclusively on religious figures, nise-e captured the actual appearance and personality of living individuals with remarkable realism. These portraits are considered representative masterpieces of this tradition.

Third, the portraits carry a supplementary designation (tsukemono) for a fifth portrait of Kenben, an elder brother of Sadaaki who served as the head priest (bettō) of Tsurugaoka Hachimangū, Kamakura's most important shrine. This additional portrait enriches the historical record of the clan.

Artistic Highlights: The Beauty of Nise-e Portraiture

The nise-e style represented a dramatic shift in Japanese art. Before the 12th century, Japanese portraiture was almost entirely religious in character. The development of nise-e, pioneered by artists such as Fujiwara Takanobu and his son Nobuzane, introduced the realistic depiction of secular figures — courtiers, warriors, and poets — capturing individual likenesses with delicate, economical brushstrokes.

In the Portrait of Kanazawa Sadamasa, the viewer can observe this technique at work: the subject's facial features are rendered with fine, precise lines that convey a sense of the individual behind the formal attire. The two earlier portraits in the set — those of Sanetoki and Akitoki — depict their subjects in Buddhist monk's robes (sōgyō), reflecting their adoption of religious life in later years. In contrast, Sadaaki and Sadamasa are shown in the secular dress of eboshi and kariginu, giving each pair of portraits a distinctive visual character.

Despite the inevitable aging of the silk and pigments, the portraits retain a quiet power. They are not grand, heroic images but intimate, contemplative likenesses — faces of real men frozen at a particular moment in time, gazing across the centuries at us.

Where to See the Portrait: Shōmyōji Temple and Kanazawa Bunko Museum

The portrait is owned by Shōmyōji Temple, but the cultural properties of the temple are exhibited and preserved at the adjacent Kanagawa Prefectural Kanazawa Bunko Museum. It is important to note that the Four Generals' Portraits are displayed only during special exhibitions, typically once every several years. Visitors planning a trip specifically to see these portraits should check the museum's exhibition schedule in advance.

Even when the portraits are not on display, both Shōmyōji Temple and Kanazawa Bunko Museum are well worth visiting. Shōmyōji's Pure Land-style garden (Jōdoshiki Teien), centered on Aji Pond with its distinctive red arched bridge, is beautiful in every season — cherry blossoms in spring, yellow irises in early summer, and brilliant autumn foliage. The temple grounds are free to enter and include the original Niō Gate with its guardian deity statues dating to 1323.

The Kanazawa Bunko Museum itself tells the story of Japan's oldest samurai library. Its collection includes not only the Four Generals' Portraits but also the National Treasure document collection Shōmyōji Shōgyō / Kanazawa Bunko Monjo, comprising over 20,000 manuscripts and letters from the Kamakura period — an unparalleled primary source for medieval Japanese history.

Nearby Attractions

The Kanazawa area of Yokohama offers a wealth of experiences beyond the temple and museum. Visitors can explore the historic cemetery at the rear of Shōmyōji, which contains the graves of the Kanazawa Hōjō clan lords. Hiking trails lead from the temple grounds up to Mount Hinata and Mount Inari, offering panoramic views of Yokohama and the bay. The nearby Yokohama Hakkeijima Sea Paradise is a popular seaside amusement park and aquarium. And of course, the ancient capital of Kamakura — with its Great Buddha, Tsurugaoka Hachimangū Shrine, and countless temples — is just a short train ride away.

Practical Tips for Visitors

Free English-language guided tours of Shōmyōji Temple are available on weekends from 10:00 AM to 3:00 PM. The temple grounds are connected to the museum by a tunnel carved through the hillside — itself a remnant of a medieval passage. Photography policies vary by exhibition, so visitors should inquire at the museum entrance. There is no parking available at either Shōmyōji or the museum, so public transportation is recommended.