1 bottle Japanese Rice Vinegar
2 1/2 cups Sugar
1/2 cup Salt
2 Tbsp Ajinomoto (MSG)
Boil all ingredients until sugar dissolves. Pieces of ginger or dried shrimp may also be added. Store in refrigerator. Use as needed. Warm mixture before using for sushi rice.
Adapted from Favorite Island Cookery, Book I, 1973