Wash the sushi rice until the water runs almost clear. Cook rice in rice cooker, or alternatively in a saucepan on the stove. After the rice is done, let it sit in the rice cooker for about 15 minutes, then add the Dressing ingredients and mix well. Adjust the seasonings to taste. If you are serving immediately, add the remaining ingredients. Otherwise, cover the rice and refrigerate until serving. Just before serving, mix in the remaining ingredients.