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1
Rinse the rice repeatedly until the water runs clear, then soak for 30 minutes in cold water. Drain completely and allow to stand in the strainer for 10 minutes. The grains should appear opaque and chalky white — this is the correct degree of hydration before cooking begins.
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2
Measure the total cooking liquid: combine dashi, soy sauce, mirin, and sake. The combined volume of all liquids — including soy, mirin, and sake — must equal exactly the standard water measurement called for by that volume of rice. Too much liquid produces mushy rice; too little leaves the grain undercooked. This is where the dish lives or dies.
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3
Pre-season any protein (chicken thigh pieces) with a small amount of soy and sake before adding to the pot. This prevents uneven flavour distribution. Vegetables and mushrooms that release significant moisture — such as raw onion or tomato — must not be used; their steam will disrupt the liquid calculation. The seasoned ingredients should carry a light, even glaze of colour.
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4
Place the drained rice in the rice cooker bowl or heavy pot. Pour the precisely measured cooking liquid over the rice. Arrange the prepared seasonal ingredient (matsutake slices, bamboo shoot, chicken pieces, or reconstituted shiitake) on top of the rice without stirring. For matsutake gohan, lay the sliced mushrooms across the surface — they must not be submerged in the liquid below. The surface should appear level and undisturbed.
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5
Cook using the standard rice-cooker cycle, or over a high flame brought to the boil, then reduced to the lowest possible heat for 12–15 minutes, then briefly raised for 10 seconds before removing from heat. Do not lift the lid or stir at any point during cooking. Stirring disrupts steam circulation and produces unevenly cooked rice. The correct signal at the end of cooking is a faint crackling sound as any residual surface moisture evaporates.
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6
With the lid firmly in place, rest the pot off the heat for 10 minutes. The retained steam finishes the grain and allows all flavours to integrate fully into each rice kernel. After resting, open the lid: a clean, sweet dashi-soy aroma should rise immediately, carrying the specific character of the season's ingredient.
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7
Using a flat rice paddle, fold the contents from the bottom upward in broad cuts — do not stir in a circular motion. Each grain should be separate and glossy, carrying an even amber tone from the soy and dashi. No grain should be wet or collapsed. Serve immediately into lacquer or ceramic bowls.