Shiboridashi

The smallest brewing vessel in Japanese tea: a shallow handleless bowl with a lid and a pinched pouring lip, holding perhaps 50 to 70 ml. It predates the houhin, it has no strainer in the usual sense, and it exists to produce a very small amount of very concentrated gyokuro.

Capacity
50 to 70 ml
Material
unglazed clay or porcelain
Origin
Japan, predates the houhin
Best for
concentrated high-grade gyokuro, a few mouthfuls at a time

What it is

The name means something close to squeeze out, and the construction is minimal: a wide flat bowl, a close-fitting lid, and a lip formed by pinching the rim. Instead of a mesh, the inside of the lip carries fine grooves cut into the clay, and the leaf catches on those as the liquid runs out between them. That grooved lip is the defining difference from a houhin, which has a proper spout and a real strainer.

What it does to your tea

It concentrates it. Because the vessel is shallow and small, a normal dose of leaf sits in very little water, and the result is a thick, intensely sweet and savoury liquor rather than a drink in the ordinary sense: two or three mouthfuls at a time. The flat base spreads the leaf in a single layer, so every leaf is in contact with the same small volume of water rather than sitting in a heap.

What it suits

High-grade gyokuro, and essentially nothing else. It is a specialist instrument and does not pretend otherwise.

How to use one

Water at 40 to 50 degrees Celsius for gyokuro, barely enough to cover a generous bed of leaf, and steep for a couple of minutes. Tilt the whole thing and pour through the grooves, holding the lid down with your fingers. Expect to fill a very small cup. Later infusions climb in temperature and shorten.

How to choose one

Look at the grooves. They should be fine and evenly cut, because they are the entire filtration system, and coarse ones will let leaf through while too-fine ones clog. Check the lid fits with almost no play, since your fingers hold it in place through the pour. Shallow beats deep.

Care and cleaning

Hot water, no detergent if it is unglazed, and take particular care with the grooves: rinse them from the inside rather than picking leaf out of them, which chips the clay ridges.

What people get wrong

Using it like a small teapot. It is not a scaled-down houhin, it is a different technique: less water, cooler water, longer steep, tiny yield. Filling it to the brim with 70-degree water and expecting a cup of tea will disappoint on every axis.

What it is made of

teabert, the tealytics teapot, keeper of the kettle
This one makes two swallows of tea and they are worth the whole ritual. It is not a small teapot, it is a different idea.