Japan — clay pot cooking tradition predating written history; Iga pottery production documented since 13th century
The donabe (clay/earthenware pot) is one of Japan's most ancient and most currently celebrated cooking vessels — experiencing a significant renaissance driven by chefs and home cooks recognising that its unique heat properties produce results impossible to achieve in metal pots. Clay's thermal characteristics differ fundamentally from metal: it heats slowly and distributes heat very evenly, holds temperature with extraordinary stability, and releases heat slowly after the flame is removed. These properties make donabe ideal for rice cooking (the even, slow heat produces uniform gelation and the characteristic bottom crust), long simmering (nabe dishes, soups, braised meats), and steaming. The porous nature of unglazed or lightly glazed clay also allows very small amounts of moisture exchange with the food, though most modern donabe have fully glazed interiors. The Iga region in Mie Prefecture produces the most celebrated donabe, made from clay that has been buried in the earth for centuries and has a unique mineral composition that is said to produce exceptional heat characteristics. Iga donabe are expensive and considered heirloom objects. Care of donabe requires seasoning before first use (filling with rice-water and simmering to seal micro-pores), careful handling (thermal shock from rapid temperature changes cracks clay), and drying completely after washing (moisture trapped in clay can cause cracking during heating).
Food cooked in donabe has a distinctive, slightly mineral character from the clay interaction, and an evenness of texture — braised proteins are uniformly tender, rice is consistently perfect — that reflects the pot's superior heat management.
Thermal shock is the primary enemy — never move a hot donabe to a cold surface, never add cold liquid to a very hot empty donabe. Season before first use: fill with rice-water (the cloudy water from washing rice) and bring to a very gentle simmer for 30 minutes. Clay requires complete drying before storage — moisture in the clay expands during heating and cracks the pot. Low-to-medium heat only; donabe's heat retention means high heat easily causes burning at the bottom.
The best rice cooked in a donabe is arguably the best rice you can make at home — even, gentle heat and the clay's moisture management produce results that outperform most electric rice cookers. The sequence: soak rice 30 min in the donabe with measured water, high heat until steam erupts from the lid (listen for the sound), reduce to lowest possible flame for 10 minutes, remove from heat, rest covered 10–15 minutes, remove lid, place a clean cloth over the pot and replace the lid to absorb steam for 5 more minutes. Invest in a quality Iga donabe if possible — the heat properties are measurably superior to cheap clay pots. For nabe cooking, the donabe maintains the gentle simmer essential to proper nabe texture without requiring constant adjustment.
Rapid temperature changes — taking a hot donabe and placing directly on a cold counter, or adding cold water to a hot dry pot — are the most common causes of cracking. Washing in cold water while still hot causes immediate cracking. Storing while still damp allows mold growth in the clay and weakens the structure. Using on induction cooktops without a specific induction-compatible model (most traditional donabe are not induction-compatible).
Japanese Farm Food — Nancy Singleton Hachisu