Old Seto Yellow Glaze Uonami Pattern Bottle

Ko-Seto Yellow-Glazed Bottle with Fish-and-Wave Design: A Masterpiece of Medieval Japanese Ceramic Art

Tucked away among the cultural treasures owned by the City of Nagoya is one of the most remarkable surviving examples of medieval Japanese pottery: the Ko-Seto Yellow-Glazed Bottle with Fish-and-Wave Design (古瀬戸黄釉魚波文瓶, Koseto Ōyū Gyoha-mon Hei). Standing 36.1 centimeters tall, this Kamakura-period vessel was designated an Important Cultural Property of Japan in 1986. It speaks to a moment when Japanese potters, drawing inspiration from imported Chinese ceramics, created something distinctively their own at the kilns of present-day Seto City in Aichi Prefecture.

For travelers interested in Japan's ceramic heritage, this bottle is a touchstone. It connects the medieval Seto kilns to the broader story of "setomono"—a word that became synonymous with pottery throughout Japan—and it offers a glimpse into a fourteenth-century world where merchants, monks, and aristocrats prized vessels of this kind for ritual and daily use alike.

Historical Background: The Seto Kilns and Ko-Seto Tradition

The Seto kilns, located around present-day Seto City in eastern Aichi Prefecture, occupy a singular place in the history of Japanese ceramics. During the medieval period, Seto was the only kiln site in the entire Japanese archipelago that consistently produced glazed pottery. Other major kilns of the era—Tokoname, Shigaraki, Tamba, Echizen, and Bizen, collectively known with Seto as the "Six Ancient Kilns of Japan"—relied on natural ash glazes formed during firing, but Seto alone applied deliberate ash and iron glazes to its wares.

The term "Ko-Seto," literally "Old Seto," refers to the glazed wares produced at the Seto kilns from the late twelfth century through the late fifteenth century, a span of roughly three hundred years. Scholars typically divide this tradition into three phases: an early phase centered on the Kamakura period, when ash glazes dominated; a middle phase from the late Kamakura through the Nanbokuchō period, when iron glazes were introduced and decorative work reached its peak; and a later phase during the Muromachi period, when production shifted toward mass-produced everyday wares.

This bottle belongs to the dazzling middle phase. Production at the Seto kilns at this time was driven in part by demand from temples and aristocratic households for ritual vessels—flower vases for Buddhist altars, censers, large jars, and bottles for offerings. Potters looked to imported Chinese porcelain, particularly meiping (plum bottle) forms from the Song and Yuan dynasties, and reinterpreted them in local clay and glaze.

Why It Was Designated an Important Cultural Property

The bottle was designated an Important Cultural Property by the Japanese government on June 6, 1986. Several factors lay behind this recognition.

First, the vessel is an exceptionally fine example of Ko-Seto craftsmanship at the height of its decorative ambition. The form, the glaze, and the surface ornament all converge in a piece of unusual quality. Among the many Ko-Seto bottles that survive, this one is repeatedly singled out as showing "outstanding workmanship" and a particularly accomplished sense of design.

Second, the piece can be dated with unusual precision. Pottery shards bearing nearly identical fish-and-wave decoration have been excavated from the Kayakari kiln site (萱刈窯跡) in Seto. From the same kiln site, archaeologists have recovered a komainu (lion-dog statue) pedestal inscribed with the date Genkō 4 (1324) and a ceramic plaque inscribed with Shōchū 2 (1325). These dated finds anchor the production of this bottle to the early fourteenth century, making it a securely datable benchmark for medieval Japanese ceramic studies.

Third, the bottle illustrates an important moment of cultural exchange. Its silhouette echoes Chinese meiping vessels, but its slightly wider mouth, the carved-and-stamped ornamentation, and the warm, slightly yellow-green ash glaze are distinctly Japanese reinterpretations. The piece thus stands as a witness to how Japanese potters absorbed continental influences and produced work of independent character.

Highlights and Points of Interest

Visitor Information

The bottle is owned by the City of Nagoya and is administratively registered at the Nagoya City Hosa Bunko in the Tokugawa-cho district of Higashi Ward. Hosa Bunko, however, principally houses the historic book collection of the Owari Tokugawa family, and ceramic works belonging to the city's collection are not on permanent display there. The bottle may be shown periodically at special exhibitions held at Hosa Bunko, the Nagoya City Museum (the parent institution), or at related venues. Visitors who hope to see the bottle in person are encouraged to check the current exhibition schedules of Nagoya City Museum and Hosa Bunko before traveling.

Even when the bottle itself is not on view, the Tokugawa-cho area offers a rich day of cultural exploration. Hosa Bunko, the Tokugawa Art Museum, and the Tokugawa Garden are clustered together, and the entire neighborhood is easily reached from Ōzone Station, served by JR Chuo Line, Meitetsu Seto Line, and Nagoya Municipal Subway Meijō Line.

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