Matcha bowl with spout: what a katakuchi is for

Look for a matcha bowl now and half of what you find has a lip pulled out of one side. The listings call it traditional, and they call it a matcha bowl. Both halves of that are worth unpicking, because only one of them is true.

A spouted bowl is a katakuchi, and the form is genuinely old — around 1,300 years in Japan. But it is a vessel for pouring, not for drinking. No chawan has a spout, because a chawan is a thing you hold in two hands and drink from the rim. So buy the spout if you pour your matcha into a glass, and skip it if you drink it from the bowl — and drinking from the bowl is what a chawan is for. And whichever you choose, buy on the width of the bowl rather than the lip — which happens to be the one number most of these listings leave out.

What a katakuchi is

Kata is one side and kuchi is mouth: a bowl with a mouth on one side only. Archaeologists have pulled them out of the ruins of Heijo-kyo, the capital through most of the eighth century, and the form is traced back further still, into Jomon and Yayoi pottery. Nearly every major kiln has made them — Karatsu, Shigaraki, Bizen — each in its own clay.

What they were made for, in every one of those centuries, was pouring. Sake first, and then broth, sauces, dressings: liquid that leaves the vessel and goes somewhere else.

So when a listing tells you the katakuchi is traditional Japanese, it is telling the truth. It is simply not telling you that the tradition is a serving vessel rather than teaware.

The tea room does have a use for a spout

This is the part I find genuinely interesting, and I have not seen anyone write it.

There is a spouted vessel in tea. It is the mizutsugi, the jug used to add water to the water jar, and one of its two standard forms is a katakuchi — the other being shaped like a kettle. It is a working object rather than a decorative one, and it is carried in both hands.

In other words, tea looked at the job of pouring, decided it needed a vessel for it, and gave that vessel a spout. It just did not give one to the bowl. The bowl was left as a bowl, because the tea in it is not going anywhere except to the person holding it.

That is the whole argument, and it is not really an argument about authenticity. It is about what the object is doing in your hands.

What happens when you compare the actual dimensions

I went through the spouted bowls on the first page of a US search and wrote down every measurement each seller gave. The result surprised me.

Every spouted bowl that gives a width falls between 12.7 and 14.7 cm across, and between 7.5 and 8.7 cm tall. That is the same territory as an ordinary bowl for thin tea, which sits at 11 to 13 cm across and 7 to 8 cm deep. The spout has changed the rim. It has not changed the bowl.

And every bowl that leads with a volume instead — 580 ml, 500 ml, 16 oz — declines to tell you the width at all. That is the pattern worth carrying into a purchase, because volume is the wrong number. A vessel can reach 580 ml by being deep and steep-walled, and steep walls are exactly what a whisk cannot work in: the tines need to travel in a brisk line across a flat base, and a bowl that curves up too soon turns that line into a scoop. The listing is quoting the one specification that can rise while the bowl gets worse.

What the spout actually costs you

Three things, and only one of them is real.

It does not hurt the whisking. The lip is cut at the rim, well above the level the tea sits at and well above where the tines travel. I have never had a spout interfere with foam, and mechanically there is no way it could. If a spouted bowl whisks badly, the shape is the reason and the spout is a bystander.

It does affect drinking, and it depends entirely on how sharply the lip is pulled. You turn a bowl in your hands and drink from the rim, so a pronounced beak puts a channel where your mouth goes and you end up steering around it. A soft, low lip — the kind that reads as a slight easing of the rim rather than a spout bolted on — does not. This is the one specification worth looking at closely in the photographs, and it is not something any seller states in words.

It gives you one more corner to dry. Minor, but a pulled lip holds a bead of water longer than a plain rim does, and it is the part people wipe last.

So which one should you buy

Where I land

The bowl I stock has a spout, and I will still tell you that the spout is the least important thing about it. It is 12.5 by 10.5 cm across and 7.5 cm tall, matte black inside, and the lip is drawn out softly rather than pulled into a beak — which is why it pours cleanly into a glass and stays comfortable to drink from. The width and the flat base are what make the tea work. The lip is a convenience I am glad of on a hot morning.

Buy the bowl on its width first, its depth second, and how it feels in your hands third. Treat the spout as a preference, the way you would treat the color. If a seller will not tell you how wide the bowl is, that silence is the answer.

Questions I get asked

What is a matcha bowl with a spout called?

A katakuchi — literally one-sided mouth. Strictly it is the name of the spouted vessel itself, not of a kind of tea bowl, which is the root of most of the confusion. A bowl for tea is a chawan, and a chawan does not have a spout.

Should a matcha bowl have a spout?

Only if you pour the tea somewhere else. For iced matcha and lattes a spout is genuinely useful and I would take it. For a plain bowl of thin tea you drink from the rim, it is a small obstruction with nothing to offer in return.

Can you whisk properly in a spouted bowl?

Yes. The spout sits at the rim and the whisk works at the base, so they never meet. What ruins whisking is a narrow or steep-sided bowl, which is a separate fault that spouted bowls happen to have more often because so many of them are sold as mixing vessels.

Is a spouted bowl traditional?

The form is — around 1,300 years of it, and there is a spouted jug in the tea room for adding water to the water jar. Using one as the bowl you whisk and drink from is modern, and it came from cafes rather than from tea practice. That is not a criticism; it is just worth knowing what you are buying.

Glass or ceramic?

Glass photographs beautifully and shows you the foam building, which is a real pleasure when you are learning. Ceramic holds heat, and for thin tea whisked with water just off the boil that matters more than it sounds — a thin glass bowl gives the heat up quickly. If the bowl is for iced matcha, glass is fine. If it is for hot tea in winter, take the ceramic.

Where this fits

The spout is one decision inside a larger one. How to choose a matcha bowl covers the width, depth and shapes in full, and iced matcha is the case where a spout earns its place. If you are still assembling the pieces, the beginner's guide covers the whisk and the scoop as well; the whisk I stock is a 100-prong Takayama chasen, and the complete set puts the bowl, the whisk and the tea together.

Written by Mio.K, who chooses everything in this shop by hand in Japan.