A simple and reliable method for seasoned sushi rice, perfect for rolls, bowls, and nigiri. Adapted from Sushi Cookbook for Beginners by Chika Ravitch.
Add rice to a fine-mesh strainer set on top of a bowl. Rinse under cool water while gently stirring with your fingers. When the water in the bowl turns cloudy, lift the strainer with the rice and pour out the cloudy water. Return the strainer to the bowl and repeat until the water remains clear.
Transfer the rinsed rice to a medium bowl and add the measured water; let stand at room temperature for 15 minutes.
While the rice soaks, mix the rice vinegar, sugar, and salt in a small bowl until dissolved; set aside.
Pour the rice and soaking water into a heavy saucepan and add the kombu. Cover and bring to a boil over high heat. Once boiling, reduce heat to low and cook for 10 minutes. When the water is absorbed, remove from heat, place a kitchen towel under the lid, and let steam for another 10 minutes.
Discard the kombu and transfer rice to a wide mixing bowl. Add the vinegar mixture and use a rice paddle to gently fold the seasoning through the hot rice, taking care not to mash the grains. Cover with a damp cloth and cool to room temperature before using for your sushi within 4 hours.
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Notes
Kombu adds subtle umami, but the recipe works without it.
For a sweeter flavor, use up to 1½ tablespoons sugar.
When folding in the seasoning, avoid mashing; use slicing and lifting motions to preserve the texture.