Tetsubin: Making of Japanese Cast Iron Teapots


Interested in seeing how a Japanese teapot is made? This is a series of pictures showing our Hobnail Cast Iron teapots being made in a Japanese teapot factory. For over 100 years, this factory has been producing cast iron teapots and they are known for their fine artistry and attention to detail.

First a couple of points: Cast Iron is the best way to brew tea for several reasons:

  • Cast iron teapots evenly distribute the heat throughout the pot for a more even temperature, which does a better job of extracting the flavors and health benefits from the tea leaves.
  • They also retain heat for hours. If you add a teapot warmer with a tea light, your tea will stay hot for five to eight hours.
  • With proper care, Cast Iron teapots will never break or rust. They can last a lifetime.
  • They are also the easiest way to make tea: they include a stainless steel basket, so you put the tea in the basket and the hot water in the pot. Once the tea is done just remove the basket and enjoy your hot tea for hours.
  • Cast Iron pots are also very decorative and often have symbolic meanings.

Our cast iron pots are all lead-free.

The making of a tetsubin, or Japanese cast iron, teapot starts with the mold. First the molds are created and the inner mold is put into position:

Making the Tetsubin mold

Next the liquid iron is heated and poured into the mold. This pivotal step requires extremely hot iron as you can see:

Liquid Iron poured into teapot mold

Once the iron cools and hardens, the inner and outer molds are broken to release the teapot.

Molds are broken to reveal Tetsubin teapots

The next step requires a great deal of artistry. The raw edges are hand smoothed using a sanding machine and an experienced artisan. At this point, much work has gone into the pots, but it is easily ruined by someone with less skill:

Tetsubin hand smoothed

Once that process is done, the next step is coating the inner surface with a protective enamel by hand. This enamel creates a barrier that should last a lifetime with proper care. When washing a tetsubin teapot, we recommend using only very hot water, rather than soap or detergent. This ensures that the pots inner enamel surface remains intact. Here is a Japanese woman coating the inner surface:

Tetsubin teapot coated with enamel

Next, the external painted surface is hand applied. We offer several colors, but these appear to be black or a grey:

Tetsubin teapots hand painted

Once painted, the extra color on the surface is removed by hand also. In this step the teapot is patted (not rubbed) dry to lightly lift off the extra color. The first time you clean your teapot, some of the color may bleed off slightly, but this does not indicate a defect. The drying process also creates a beautiful finish to the teapots:

Cast Iron teapots being dried

Finally the teapots are finished. The final product is inspected completely before being packaged and shipped to Teavana stores. In total, it takes an average of fifteen people, some of whom are very skilled artisans, to make an authentic tetsubin teapot.

Hopefully that gives you a better understanding of the steps in making these beautiful teapots. We’re proud at Teavana to carry only authentic Tetsubin, which are the cast iron teapots hand-made in Japan.

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Reader Comments

I Love those teapots!

[...] cast iron pots look beautiful as you serve tea or as they sit on your counter. However, the best cast iron pots are handmade in Japan, which makes them more expensive than most other [...]

I just acquired a 2nd hand tetsubin teapot, and in my excitement, I washed it with dishwashing detergent and a sponge with a scrubber pad because there was a layer of rust in it. After doing some internet research on the care of tetsubin teapots, I realized that that’s exactly how NOT to clean it! It still has some rust in it as well as some scratches. Have I damaged it beyond use? Is there anyway to salvage it?? Any advice would be much appreciated!

To New Tetsubin owner:

It sounds like your cast iron is a goner. Essentially, you will get absolutely the BEST tasting tea out of a cast iron pot, but you have 3 elements potentially barring the way: Rust (not super tasty, and depending on how much rust you have, not so good to ingest); sounds like your pot doesn’t have an enamel coating inside and; detergent residue. If your pot DOES have enamel coating inside of it, and if you can wash and rub the majority of the rust off (so it is not visable) you might be alright. But you’d be happier, I think, with a shiny new one that you could ensure from the outset won’t rust. Good luck!