Tenmoku
Tenmoku is the name Japan gave to the dark-glazed tea bowls of the Jian kilns in Fujian, China, and to the bowls made after them. The name comes from Tianmu Mountain, where such bowls were believed to have come from. In Song China they were prized by Buddhist monks and tea drinkers; in Japan they were collected so keenly that many of the best surviving examples are here.
Definition
Jian ware is stoneware made in Jianyang in Fujian province, in simple shapes, mostly small tea cups and bowls, with a light-coloured body under a dark glaze. The glaze was made from a clay like that of the body, fluxed with wood ash, and fired at about 1,300 degrees Celsius. As excess iron was forced out of the glaze during firing, it produced the effects collectors name: hare's fur, oil spot and partridge feather. In Japan the word tenmoku covers both the Chinese bowls and local imitations.
Origin
Jian ware reached the peak of its popularity in the Song dynasty, when tea was whisked from a powder into a white froth that showed best against a dark bowl, a method somewhat like the later Japanese preparation of matcha. A Song writer noted that the bluish-black cups of Jianyang, marked like a hare's fur, held their heat and were unrivalled. The bowls reached Japan with Zen and tea, and became classic karamono. Five Southern Song bowls are so highly valued in Japan that they have been designated National Treasures.
Key facts
| Chinese name | Jian ware |
|---|---|
| Kilns | Jianyang, Fujian |
| Peak | Song dynasty |
| Glaze effects | Hare's fur, oil spot, partridge feather |
| In Japan | Five Southern Song bowls designated National Treasures |
How to identify it
- The glaze. Dark, often thick near the foot, where it pooled when the bowl was fired at a tilt.
- The pattern. Fine streaks for hare's fur, silvery spots for oil spot.
- The foot. In our handling, the unglazed foot shows the body clay, which is the first thing we look at.
- China or Japan. The word on a box can mean either; we describe a bowl as Jian ware only where it reads as one.
Kinds of tenmoku
In Japan the word grew wider than the Jian kilns. Zen monks who studied at Tianmu Mountain in Zhejiang brought bowls and the habit of tea back to Kamakura-period Japan, and by the time of the shogun Ashikaga Yoshimasa iron-glazed bowls in general were being called tenmoku. Japanese collectors name the Jian types yōhen, with iridescent spots, the rarest of all; yuteki, oil spot; haikatsugi; and nogime, hare's fur. From the Jizhou kilns in Jiangxi come the leaf tenmoku, with a real leaf fired into the glaze, and others. There are also Henan, Korean and Japanese tenmoku, such as the kikka tenmoku of Seto, and Mino potters even made a white-glazed bowl called white tenmoku. Only three or four yōhen bowls are thought to survive, all in Japan; three are National Treasures. The classic tenmoku shape has a small foot, a conical body and a rim with a slight inward step, valued because it kept the tea warm. In our handling, a dark glaze alone is not enough to call a bowl tenmoku, and we describe shape, glaze and foot together.
Where it appears in the collection
Tea bowls sit with Japanese ceramics and the tea room objects on the Japanese arts and antiques shelf. Our essay on the chawan and our guide to karamono give the context.
Related entries
- Celadon: the green-glazed ware that sat beside tenmoku in the tea room
- Kintsugi: the gold repair seen on many tea bowls
Sources
- Jian ware, encyclopaedia entry, for Jianyang, the glazes and their firing, the Song tea method, the name tenmoku and the National Treasures. wikipedia.org
- Tenmoku chawan, Japanese-language encyclopaedia entry (our translation), for Tianmu Mountain and Zen monks, the Japanese naming of types, Jizhou, regional tenmoku, the yōhen bowls and the rim. ja.wikipedia.org
Last reviewed 15 November 2026. The Japonista Curation and Concierge Team, Tokyo, Japan.