Tencha Drying Oven

A tencha drying oven, or tencharo, is the oven used to dry steamed tea leaves without rolling them, creating tencha—the leaf material that is later milled into matcha. Unlike sencha processing, where leaves are rolled into a shaped form, tencha processing keeps the leaves relatively open as moisture is removed.

Role in matcha processing

The tencha drying oven appears after covered tea leaves are harvested and steamed to halt oxidation. Drying without rolling leaves them as thin, flat flakes. After stems and veins are removed through refining, the result is tencha. Finely milling tencha produces matcha.

Related terms can be confusing. A general “dryer” may refer to many types of tea equipment, while hiire often refers to finishing heat treatment used to adjust aroma and keeping quality. Stone milling is a general term for one way of grinding tencha into powder; it is a separate step from the tencha drying oven itself.

In the overall flow of how matcha is made, the tencha drying oven sits between cultivation and final milling. Its essential role is the non-rolled drying that prepares the leaf for later refining and grinding. Equipment style and operating conditions can vary by producer and factory.

ICHIZEN’s Kyoto Uji matcha is selected and refined by Wakimoto Jokoen, then machine-milled into an ultra-fine, uniform powder. The tencha drying oven is useful to understand as part of the earlier tencha-making stage, not as a serving tool or a quality grade by itself.

For buyers, the practical point is simple: matcha is powdered tencha, and tencha is dried without rolling. When tasting matcha, look at color, aroma, whisking texture, bitterness, astringency, and umami together rather than judging by equipment terms alone. After opening, keep matcha sealed and away from heat, light, and moisture.