Kachō Saie Yushoku-bako: A Masterpiece of Nara-Period Oil-Color Painting

Among the many treasures associated with Tōdai-ji Temple in Nara, few are as visually captivating as the Kachō Saie Yushoku-bako (花鳥彩絵油色箱), or "Flower and Bird Painted Oil Color Box." This exquisite wooden box, dating from the Nara period (710–794), is designated as a National Treasure of Japan and stands as a rare surviving example of the ancient oil-color painting technique that once flourished across East and Central Asia.

Measuring approximately 60 cm in length, 71 cm in width, and 24 cm in height, this substantial wooden box is adorned with brilliantly painted images of phoenixes (hōō), parrots (ōmu), and elaborate hōsōge (宝相華) — a stylized floral arabesque motif widely associated with Tang Dynasty Chinese art. The surface shimmers with a distinctive luster that has endured for over 1,200 years, thanks to the remarkable "yushoku" (油色) technique used in its creation.

What Is the Yushoku (Oil-Color) Technique?

The term "yushoku" (油色) refers to a decorative painting method in which the entire painted surface is coated with drying oil after the application of pigments. This serves a dual purpose: it produces a beautiful glossy sheen while simultaneously protecting the underlying colors from deterioration. The technique is closely related to "mitsuda-e" (密陀絵), another ancient form of oil-based painting found among the treasures of the Shōsō-in Repository.

Mitsuda-e involves mixing pigments with drying oils — primarily perilla oil (egoma) — often with the addition of lead oxide (mitsuda-sō) as a drying agent. This technology was introduced to Japan from Sui and Tang Dynasty China during the Nara period and continued in use until the early Heian period. It allowed artisans to achieve colors and visual effects that were difficult to produce with lacquer alone, including bright whites, delicate pastels, and brilliant glossy finishes.

The Kachō Saie Yushoku-bako is a prime example of this technique, representing one of the finest surviving specimens of Nara-period oil-color painted woodwork anywhere in the world. It predates European oil painting by nearly seven centuries, offering a fascinating perspective on the global history of oil-based art techniques.

Why Was It Designated a National Treasure?

The Kachō Saie Yushoku-bako was first designated as an Important Cultural Property on April 5, 1909, and was subsequently elevated to National Treasure status on June 27, 1959. Several factors contributed to this prestigious designation:

• It is an exceptionally rare surviving example of the yushoku oil-color painting technique from the Nara period, a method that has largely disappeared from the artistic record.
• The painted decoration — featuring phoenixes, parrots, and hōsōge arabesques — represents the highest level of Nara-period decorative arts, reflecting the cosmopolitan artistic exchange between Japan and Tang Dynasty China.
• Its remarkable state of preservation allows scholars and visitors to appreciate the vivid polychrome palette and glossy surface finish that would have characterized luxury goods in 8th-century Japanese temple culture.
• As a possession of Tōdai-ji, one of Japan's most historically significant temples, the box provides invaluable insights into the material culture and artistic patronage of the Nara court and Buddhist establishment.

Decorative Motifs: Phoenixes, Parrots, and Sacred Flowers

The painted decoration of the box showcases three principal motifs, each carrying deep symbolic and cultural significance in East Asian art:

The phoenix (hōō) was considered a sacred bird of utmost auspiciousness in both Chinese and Japanese traditions. Its presence on ceremonial objects signified imperial authority, virtue, and the promise of peace and prosperity. The phoenixes painted on this box exemplify the elegant, flowing style characteristic of Tang Dynasty decorative art.

Parrots (ōmu) were exotic birds associated with the distant lands along the Silk Road. Their inclusion reflects the international character of Nara-period culture, when Japan actively engaged with the broader world through diplomatic missions and trade. Parrots frequently appear in Shōsō-in treasures and other Tenpyō-era decorative arts.

The hōsōge (宝相華) arabesque is a composite floral motif that blends elements of the lotus, peony, palmette, and pomegranate blossom. Originating in Central and Western Asian art, the design traveled eastward along the Silk Road and became one of the most beloved ornamental motifs of Tang Dynasty China and Nara-period Japan. On this box, the hōsōge patterns create a lush, paradisiacal backdrop that frames the painted birds.

Tōdai-ji Temple: The Guardian of a National Treasure

The Kachō Saie Yushoku-bako is owned by Tōdai-ji, one of the most celebrated Buddhist temples in all of Japan. Founded under the patronage of Emperor Shōmu in the 8th century, Tōdai-ji was the center of state-sponsored Buddhism during the Nara period. The temple's Great Buddha Hall (Daibutsuden) houses the colossal bronze Vairocana Buddha, a symbol of the era's spiritual ambitions and artistic achievements.

Tōdai-ji has served as the custodian of numerous cultural properties for over 1,200 years. The temple's collection includes many National Treasures and Important Cultural Properties spanning sculpture, painting, calligraphy, and decorative arts. The nearby Shōsō-in Repository — a UNESCO World Heritage Site as part of the "Historic Monuments of Ancient Nara" — preserves approximately 9,000 artifacts from the Nara period, offering an unparalleled window into 8th-century East Asian culture.

Where and When Can You See It?

The Kachō Saie Yushoku-bako is entrusted to the Nara National Museum for safekeeping and is not on permanent public display. However, it is exhibited approximately once every three to five years during special exhibitions. Notable recent exhibition opportunities include:

• May 20 – June 15, 2025: Nara National Museum, "Oh Kokuhō — Radiance of Prayer" (超・国宝 − 祈りのかがやき −), a landmark exhibition commemorating the museum's 130th anniversary featuring approximately 110 National Treasures.
• December 8, 2020 – January 11, 2021: Nara National Museum, "Gems of Buddhist Art" (珠玉の仏教美術).
• May 25 – June 20, 2017: Kyoto National Museum, "National Treasures Exhibition" (国宝展).

For visitors planning a trip to Nara, checking the exhibition schedules of the Nara National Museum and the annual Shōsō-in Exhibition (held each autumn, typically late October to early November) offers the best chances to view this and other extraordinary treasures from the Nara period.

Exploring the Surroundings: Nara's Cultural Landscape

A visit to see the Kachō Saie Yushoku-bako provides the perfect opportunity to explore Nara's remarkable concentration of cultural heritage sites. The Nara National Museum is situated within Nara Park, a vast green space famous for its freely roaming deer — considered sacred messengers of the gods in Shinto tradition.

Within walking distance of the museum, visitors can experience Tōdai-ji Temple and its magnificent Great Buddha, the Shōsō-in Repository exterior (open to the public on weekdays), Kasuga Grand Shrine with its thousands of stone and bronze lanterns, and Kōfuku-ji Temple with its iconic five-story pagoda. All of these are part of the UNESCO World Heritage Site "Historic Monuments of Ancient Nara."

The charming Naramachi district, a former merchant quarter with well-preserved traditional townhouses (machiya), offers boutique shops, cafés, and restaurants specializing in local Nara cuisine. For visitors arriving from Osaka or Kyoto, Nara is easily accessible by train, making it an ideal day trip or an enchanting overnight destination.