To cook the rice: Place the rice in a mesh sieve and rinse rice until the water runs clear. Place rice in rice cooker with water and oil. Stir.
When the rice is cooked transfer to a large bowl and let it stand for about 10 minutes.
In a small bowl mix together rice vinegar, sugar, and salt. Add to the rice a little bit at a time while turning with a wooden spoon.
Cover with a damp cloth and allow it to sit for about 30-45 minutes. You will end up with about 2 cups of cooked rice.
To roll the sushi: Place a piece of nori sheet on top of the bamboo mat. Put the sticky rice on top of the nori flattening down with a wooden spoon. The rice should go up about two thirds up the nori sheet.
Place fillings adjacent to each other.
Take the edge of the bamboo mat nearest you and curl over the nori, keeping the filling in place.
Seal with water.
To cut evenly: First slice the finished roll in half. Place both halves next to each other and cut into thirds.*
* dip knife in water in order to make slicing easier.