Rice vinegar is a vinegar type that's made from fermented rice. It's popular in China, Japan, Korea, and Vietnam. There are a few varieties of rice vinegar, namely red, white, black, and seasoned. This vinegar is mostly used in dressings, sauces, and marinades, but also for pickling vegetables.
It's less acidic than balsamic, red, and white wine vinegars, while the flavor is milder and sweeter than most Western vinegars. The red variety is tart and sweet, and it's used in soups, noodles, and seafood dishes. The black one is made from glutinous or sweet rice and it has a rich and smoky flavor.