Yuzu has a tart, sour flavor, sort of like a lemon mixed with a mandarin orange, but with a savory note that some liken to rice vinegar, says Sushi Modern. Yuzu juice is one of the main ingredients in ponzu sauce, a soy sauce-based dipping sauce often served with fried foods, dumplings, and sushi, while the zest from the fruit can be used to make a spicy condiment called yuzu-kosho.