It is important to clean/rinse rice... In a large sauce pan, cover rice with water and swirl. Drain water. Repeat about three times, or until water is relatively clear. Drain completely and add two cups water and salt. **Bring to a boil, uncovered over high heat. Once boiling, reduce heat to lowest setting and cover. Cook for 15 minutes. Remove from heat, transfer rice to a large shallow bowl. Cover with a damp towel and allow to cool.
Combine rice vinegar and sugar in a microwave safe bowl. Microwave for about 45 seconds, or until sugar is dissolved.
Once rice and vinegar is cool, pour vinegar/sugar over rice and, using the side of a wooden spoon, cut the rice (don't stir) to mix.
Keep rice covered with a damp towel to prevent drying.