Yuzu is a Japanese citrus lemon that is valued for it’s highly aromatic rind and Yuzu is one of the few citrus in the world that is able to maintain it’s tart/sourness at high cooking temperatures. Because the yuzu is considered a citron, the juice is very minimal, thus often expensive. Outside of a few Asian cuisines and particularly in Japanese cultural circles, yuzu is seldom grown or used because it’s rather rare. Used in both green and more ripe, yellow forms it’s a prized citrus in the culinary world