Yuzu sake, or Yuzushu, is a popular Japanese liqueur made by infusing sake with the fragrant, tangy yuzu citrus fruit, resulting in a refreshing, sweet-tart drink with complex citrus (lemon/tangerine/lime) aromas and a smooth sake base, often enjoyed chilled, on the rocks, or as a spritzer with sparkling wine for a light, zesty cocktail. It blends traditional brewing with bright citrus flavors, making it a versatile aperitif or mixer.