Rinse 2 cups sushi rice under cold water until the water runs mostly clear
Drain the rice well
Add the rinsed rice to the rice cooker
Add 2 cups water
Close the lid and cook on the regular white rice setting
Let the rice rest in the cooker for 10 to 15 minutes after cooking
Mix 1/4 cup rice vinegar, 2 tablespoons sugar, and 1 teaspoon salt until dissolved
Transfer the cooked rice to a large nonmetal bowl
Pour the vinegar mixture over the rice
Fold the rice gently with a rice paddle or spatula
Fan the rice while mixing until it becomes glossy and cool
Cover the rice with a damp cloth until ready to use