Yuzu Sour is a refreshing citrus cocktail that is popular in Tokyo. It is made with yuzu juice, which is a Japanese citrus fruit known for its aromatic and tangy flavor. Yuzu Sour is typically mixed with shochu (a distilled spirit), soda water, and a touch of sweetness. The resulting drink is light, citrusy, and perfect for hot summer days. Many bars and izakayas in Tokyo offer Yuzu Sour on their drink menus.