Rice Vinegar ( Yonezu, or Su in general)

Out of all the varieties of vinegars, the rice vinegar (yone su, yonezu) is used to make sushi rice, because it matches rice the best. 100% pure rice vinegar that is properly fermented is recommended when making sushi. Many products are artificially produced with fermented rice flavorings. Some may contain MSG or monosodium glutamate for flavorings.

Besides the flavors, the acidic content of the manufactured vinegar are lower, and do not contain macrobiotic agents so it may be unsanitary to use these to cure fish. It is important to read the ingredients and see if the rice vinegar has no ingredients other than rice and water.