Between using a rice cooker or making your sushi rice on the stove top, this is definitely the easier and more convenient option.
Measure out your rice. Basically you are going to want to use the same measurement of water that you use of rice.
2 level cups of rice : 2 cups of water – this makes about 5 to 6 cups of cooked rice
3 level cups of rice : 3 cups of water – 7 1/2 to 9 cups of cooked rice
4 level cups of rice : 4 cups of water – 10 to 12 cups of cooked rice
Place the desired rice/water ratio in the inner pot, and place inner pot in rice cooker. Plug in your rice cooker, and cook.
When rice is finished, let stand for 15 minutes before opening the lid. If you have a ‘cheap’ rice cooker, make sure to unplug it as soon as you know the rice has finished cooking, to help prevent scorching.
[The better rice cookers will cost you between $200 and $400. I bought mine for $100ish, so I have a good 'mid-grade' rice cooker]
While your rice is cooking, go ahead and make your rice vinegar dressing.
Once it’s finished, you’re ready to turn out and finish your rice.