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Donabe: Choosing and Breaking In a Japanese Clay Pot
How to pick a donabe, why the clay matters, and the one first-use step — medome — that stops it cracking and leaking. Plus the care habits that make it last.
A donabe (土鍋) is a Japanese clay pot built to sit over a live flame — for rice, for hot pot, for slow braises that carry to the table still bubbling. The clay is the point: it heats gently and holds that heat long after the burner is off. But a new donabe is porous, and if you skip the one first-use step it can leak, smell, or crack. Here is how to choose one, and how to break it in properly.
The short answer
- Season it before first use. Cook a thin rice porridge in it once (medome) to seal the clay. Skip this and it may weep water and take on odours.
- Never heat it wet or empty. A wet exterior or an empty pot on high heat is the main way donabe crack. Wipe the outside dry, add contents, start low.
- Most donabe are gas-flame only. They are not induction-safe unless the model specifically says so.
What the clay does — and where it’s from
A donabe cooks the way it does because the fired clay is slightly porous. It warms slowly and evenly, then radiates that stored heat back into the food, so a stew keeps cooking on residual warmth after you cut the flame. Two regions make most of what you’ll buy, both in Mie Prefecture:
- Banko ware (萬古焼), Yokkaichi — the workhorse. Around 80% of Japan’s donabe are Banko. The clay is blended with petalite, a lithium-rich mineral that makes it strongly heat- and shock-resistant, which is why Banko became the standard for everyday flame-cooking pots. It was designated a national Traditional Craft in 1979.
- Iga ware (伊賀焼), Iga — prized for heat retention. Iga sits on the bed of an ancient lake, and its clay is dense with fossilised plant and microorganism matter. Fired hot, that organic material burns away and leaves a body riddled with microscopic pores — so an Iga donabe holds heat exceptionally well and keeps cooking long after the flame is out.
Neither is “better.” Banko is the durable everyday choice; Iga trades a little ruggedness for that long, gentle heat prized for rice and slow simmering.
Medome — the one first-use step
New donabe clay has fine open pores (and, on some pots, hairline surface cracks). Medome (目止め) fills them with rice starch so the pot won’t seep water or absorb smells. Do it once, before the first meal:
- Wash and dry the new pot inside and out.
- Fill it about 80% with water and stir in a bowl of leftover cooked rice (a thin porridge). Rice is what makes this work — its starch is what seals the pores.
- Cook on low heat until the porridge turns thick and glossy. Keep it gentle; a hard boil isn’t needed.
- Let it cool completely in the pot — at least an hour. Cooling slowly lets the starch settle into the clay. Don’t rush it with cold water.
- Remove the porridge, rinse with water, and let the pot dry fully — ideally leave it a day before cooking in it.
A note on the popular shortcut: rinsing-water from washing rice (togi-jiru) is sometimes suggested, but it carries far less starch than actual porridge, so the seal is weaker. Use real rice. And even pots sold as “empty-heat safe” still benefit from medome — it’s about sealing pores, not surviving heat. If your donabe develops fine cracks or starts weeping after long use, simply repeat the medome to reseal it.
Living with a donabe
The clay that makes a donabe cook well is also what you’re protecting. The habits are few:
- Dry the outside before every use. A wet base over a flame causes sudden stress and cracks. Wipe the bottom, then heat.
- Never heat it empty, and never blast it. Start on low, bring the heat up gradually, and don’t drop a hot pot onto a cold or wet surface — thermal shock is the failure mode that matters.
- Wash with water, go easy on soap. Porous clay drinks up detergent and holds the smell, so avoid long soapy soaks and hard scrubbing. Warm water, and baking soda for stuck-on bits, is plenty.
- Dry it thoroughly before storing. A donabe put away damp grows mould and mustiness in the porous body. Let it air out completely — an occasional sunning helps.
- Check the base before buying for induction. A traditional donabe works on gas or an open flame, not IH — unless it’s a model made induction-compatible with a built-in metal plate.
How to choose
| If you want… | Reach for |
|---|---|
| a durable, everyday flame pot | Banko ware (petalite clay, tough) |
| the best heat retention for rice and slow simmering | Iga ware (porous, holds heat long) |
| to use it on an induction hob | A model explicitly marked IH-compatible |
One honest rule: the donabe rewards the five minutes you spend breaking it in. Season it once, keep it dry, and heat it kindly, and a clay pot cooks better every year — and lasts for decades of winters at the table.
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Sources & Further Reading
- KOGEI JAPAN — Yokkaichi Banko Ware — The craft-industry portal on Banko ware, its heat-resistant petalite clay, and its standing as Japan’s dominant donabe.
- Iga-yaki and Nagatani-en — Official Site — The Iga maker on the region’s ancient-lakebed clay and the porous, heat-retaining body that comes from firing it.
- Nagatani-en Donabe Lab — How to Season a Donabe (Medome) — A donabe maker’s step-by-step medome guide: cook a rice porridge, let it cool fully, and never heat the pot while it’s wet.