Yes. Of course, plum vinegar is sweet at the same time- sour and salty. The fruit used in its production is plums, which are dried and then combined with rice vinegar to make the sweet-and-sour condiment. The flavor of plum vinegar is due to the addition of the plums, which give it a unique sweetness that other vinegars don't have.  This makes plum vinegar is a popular choice for salad dressings, as it can add a bit of flavor to bland greens. It's also a delicious dipping sauce for sushi or other Japanese dishes.