Japan · Ceramics / Glazed Earthenware and Slip Decoration

Tsuboya Jōyachi Glazed and Painted Ware

上焼 (Jōyachi / Jōyaki)

Jōyachi (上焼, 'upper/fine-fired ware') is the glazed, decorated branch of Tsuboya ware in Naha, Okinawa: slip-covered tableware, sake vessels and vases painted, carved and glazed with natural stone-and-coral glazes. Its lineage runs through Korean potters — Ichiroku, Ikkan and Sankan — brought from Satsuma in 1616 to found Wakuta ware, and through Hirata Tentsū, sent to Qing China in 1670 to learn overglaze enamel painting; in 1682 the royal government merged the Wakuta, Chibana and Takaraguchi kilns at Tsuboya. Jōyachi has distinctly Okinawan forms — the dachibin (抱瓶, a crescent-shaped flask worn at the hip) and the karakara (spouted awamori server) — and distinctly Okinawan techniques, above all jīgakī (生掛け): glazing the raw, unbisqued body directly. The fish motif became Tsuboya's emblem. After decline under cheap mainland competition in the Meiji and Taishō eras, jōyachi was revived after Yanagi Sōetsu's Mingei movement took it up from 1938, praising the rarity of such decoration on commoners' everyday ware.

Risk level: Stable · Not inscribed. National: 'Tsuboya-yaki' METI-designated Traditional Craft Product, June 1976. Living National Treasure for 'Ryukyu pottery': Kinjō Jirō (1985, d. 2004)

Alternate Names
Joyaki; Tsuboya-yaki (glazed line); yachimun; dachibin; karakara; fish-motif ware; jīgakī raw glazing; tacchwāsā appliqué
Geographic Center
Tsuboya district, Naha City, Okinawa Prefecture; Yomitan Village (Yachimun no Sato climbing-kiln cluster, from 1968–74)
Community / Ethnic Group
Okinawan (Ryukyuan); Tsuboya kamamoto potter households
Estimated Origin
Korean potters invited 1616 (Wakuta kiln); Chinese overglaze technique studied 1670; consolidated at Tsuboya 1682
Cultural Function
Everyday tableware for all classes; awamori drinking and serving vessels (dachibin, karakara, yushibin); vases and ritual vessels
Primary Materials
Body clays from Kogachi, Kise and Ishikawa (used singly for throwing) and from Maekaneku, Yamada and Kina (blended as body stock); yellowish slip clay that fires to a deep white
Primary Tools
Potter's wheel; multi-chamber climbing kiln (nobori-gama)
Process Overview
Clay selection/blending -> wheel throwing or push-mold forming (dachibin) -> slip coating (fuigakī for interiors) -> carving/appliqué/underglaze painting -> jīgakī raw glazing (no bisque) -> climbing-kiln or gas firing -> optional overglaze red/green and refiring
Traditional Applications
Bowls, plates, cups; dachibin and karakara for awamori; yushibin ritual bottles; vases
Contemporary Applications
Tableware (yachimun) for tourism and mainland markets; studio pottery; Yomitan kiln cluster
Notable Practitioners
Kinjō Jirō (金城次郎, 1912–2004) — Living National Treasure 1985, famed for fish and shrimp motifs, directly advised by Yanagi Sōetsu; Arakaki Eisaburō (新垣栄三郎) — Tsuboya potter advised by the Mingei group. Current workshop heads not independently verified in this pass
Key References
Naha Traditional Crafts Center, 'Tsuboya-yaki no rekishi' (techniques I–II); Japanese Wikipedia, '壺屋焼' (rev. July 2026); Naha Municipal Tsuboya Pottery Museum, 'Mingei to Tsuboya-yaki' (2018); Okinawa Prefecture designated-properties register (2019)
Verification Status
Verified — history and process against Naha Traditional Crafts Center and cited sources; current practitioners not verified

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