Place 1 ¼ cups rice in a colander and rinse for about 3 minutes. After 3 minutes, put the rice in a bowl and fill the bowl with water, using your hand to swish the rice around. Let sit for 2 minutes. Drain the rice back into a colander and rinse again for 1-2 minutes until the water runs clear.
Place your rice in a pot along with 1½ cups of water. Turn the heat to high and bring the water to a boil.
Once the water is boiling, reduce the heat to low and cover. Cook, covered, for about 20 minutes.
When the time is up, keep the rice covered but remove it from the heat. Allow it to stand for about 10 minutes before proceeding.
In the meantime, put the 3 tbsp rice vinegar, 2 tbsp granulated sugar, and 1 tsp salt in a small pot and bring to a simmer. Once it begins to simmer, remove it from the heat.
Transfer the rice to a large bowl and pour the vinegar mixture over it. Use a spoon to gently mix the vinegar mixture into the rice.
Use the sushi rice to make your favorite sushi rolls like gobo sushi, rainbow rolls, or dragon rolls. Enjoy!