You just got a beautiful donabe, and you’re ready to make hot pot tonight. Hold on. If you skip seasoning, that clay pot could crack the first time you heat it — or worse, it might leak broth all over your stove.

Seasoning a donabe is called medome (目止め) in Japanese. The word literally means “filling the eyes” — those tiny pores in the unglazed clay that let moisture seep through. The whole process takes about 2 hours, and you only need water and rice.

In Japan, donabe isn’t just cookware. It’s the center of a winter ritual called nabe wo kakomu (鍋を囲む) — gathering around the pot. Families, coworkers, and friends crowd around a bubbling donabe on the table, picking out ingredients with chopsticks. The pot itself becomes a reason to sit together. So seasoning your donabe properly? That’s the first step in a tradition that goes back centuries.

What You’ll Need

• Your new donabe (or one with hairline cracks you want to repair)
• Water
• 2 tablespoons of uncooked Japanese short-grain rice or 1 small bowl of cooked rice (about 200g)
• A wooden or silicone spoon
• A clean towel
• Patience (roughly 2 hours total, mostly hands-off)

That’s it. No special oils, no fancy seasoning blends. Rice starch does all the work.

Step-by-Step: How to Season a Donabe

Step 1: Make Sure the Bottom Is Completely Dry

This is the step most people skip, and it’s the one that cracks pots. The unglazed bottom of a donabe absorbs water. If you put a wet-bottomed donabe on heat, the trapped moisture expands and the clay splits.

Wipe the outside with a dry towel. If you’ve rinsed the pot, let it air dry for at least a few hours — overnight is better. Run your hand along the bottom. If it feels even slightly cool or damp, wait longer.

Step 2: Fill With Water and Add Rice

Fill the donabe about 80% full with room-temperature water. Don’t go higher — you need space for the rice porridge to bubble without overflowing.

Add either:

• 2 tablespoons of uncooked short-grain white rice, or
• About 1 rice bowl (200g) of leftover cooked rice

Both work because you’re after the starch, not the rice itself.

Step 3: Heat Slowly on Low to Medium-Low

Place the donabe on your burner and turn the heat to medium-low. This is not the time to rush. Donabe clay needs gradual temperature changes — sudden heat causes thermal shock and cracking.

Let the water come to a gentle simmer. This should take 20-30 minutes depending on the size of your pot. If it starts boiling aggressively, turn the heat down. You want a lazy bubble, not a rolling boil.

Step 4: Simmer for 1 Hour

Once you see gentle bubbles, reduce to low heat and let it simmer for about 1 hour. Stir occasionally to prevent the rice from sticking to the bottom and scorching.

The water will turn cloudy and thicken into a thin porridge. That starchy liquid is doing the real work — seeping into the pores and sealing them from the inside.

Repairing hairline cracks? Extend the simmer to 2 hours. The extra starch has a better chance of filling those fine lines.

Step 5: Turn Off the Heat and Wait

Turn off the burner. Walk away. Do not move the pot, do not add cold water, do not pour anything out.

Let the donabe cool completely to room temperature with the porridge still inside. This takes at least 1 hour, sometimes longer for large pots. The slow cooling lets the starch settle into every pore as the clay contracts.

I know it’s tempting to speed things up. Don’t. Pouring cold water into a hot donabe is the fastest way to destroy it.

Step 6: Rinse and Dry

Once cool, discard the porridge. Rinse the donabe with warm water and a soft sponge. A tiny bit of mild dish soap is fine — just don’t soak the pot or let it sit in water.

Dry the inside with a clean towel immediately. Then flip the donabe upside down and let it air dry completely overnight. The unglazed bottom needs time to release any absorbed moisture before you store or use it.

Your donabe is now seasoned and ready for its first real meal.

Tips for Best Results

• Never heat a wet donabe. The unglazed base absorbs water, and trapped moisture + heat = disaster.
• Always start with low heat. Even after seasoning, bring the temperature up gradually every time you cook.
• Re-season once a year if you use your donabe often. The starch seal wears down over time.
• Never put a hot donabe in the sink. Let it cool on the burner or a heat-safe trivet first. Thermal shock is permanent.
• Avoid the dishwasher. The clay is porous and will absorb detergent. Hand wash with warm water and minimal soap.
• Store with the lid off. Trapped moisture can cause mold.

Why Japanese Home Cooks Take This Seriously

In Japan, a well-maintained donabe lasts decades. Japanese home cooks treat medome the way a cast-iron enthusiast treats their first seasoning — it’s a ritual that shows respect for the tool.

The difference is that donabe is fundamentally communal. A cast-iron skillet serves one person’s plate. A donabe sits at the center of the table with everyone reaching in. That shared experience — yudofu on a cold February night, sukiyaki for New Year’s, oden simmering for hours — is why Japanese families hold onto their donabe for generations.

Banko ware from Mie Prefecture accounts for roughly 80% of Japan’s donabe production. Iga ware, made from clay rich in ancient fossils, is prized for its exceptional heat retention. Both traditions have been producing donabe for hundreds of years.

Common Mistakes to Avoid

Mistake	Why It’s Bad	Fix
Heating a wet bottom	Trapped moisture expands and cracks the clay	Always dry completely before heating
Boiling on high heat	Thermal shock fractures the pot	Use medium-low, then low heat
Skipping the cool-down	Rinsing while hot causes cracks	Wait until fully room temperature
Soaking in water	Clay absorbs water and weakens	Wash quickly, dry immediately
Using the dishwasher	Detergent gets absorbed into pores	Hand wash only

Recommended Products

If you’re looking for your first donabe, the Ginpo Kikka Donabe is a solid entry point. Ginpo is a well-known Banko ware manufacturer from Mie Prefecture, and the Kikka line has been popular in Japanese households for years.

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For a deeper understanding of donabe cooking, Naoko Takei Moore’s cookbook Donabe: Classic and Modern Japanese Clay Pot Cooking covers everything from seasoning to advanced recipes.

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FAQ

How long does it take to season a donabe?

About 2 hours total. The active work is around 10 minutes — mostly you’re waiting for the pot to simmer and then cool down.

Can I use flour instead of rice?

Some people use wheat flour or cornstarch mixed with water. Rice is the traditional method and what most Japanese manufacturers recommend.

Do I need to season a glazed donabe?

If the interior is fully glazed, you probably don’t need to. But check the manufacturer’s instructions. Many donabe have an unglazed rim or base that still benefits from medome.

My donabe has a hairline crack. Can seasoning fix it?

Small hairline cracks, yes. Extend the simmering time to 2 hours. For larger cracks or chips, seasoning won’t help — the pot may need to be replaced.

How often should I re-season my donabe?

Once a year is a good rule if you use your donabe weekly during winter. If you notice moisture on the outside during cooking, re-season right away.