The main ingredient in a traditional sushi roll is rice, specifically sushi rice. Known as "shari" or "sumeshi" in Japanese, this short-grain rice is seasoned with a mixture of sugar, vinegar, and salt, giving it a distinctive flavor and sticky texture essential for holding the roll together. Sushi rolls often include a combination of fresh fish, vegetables, and sometimes fruit, wrapped in seaweed (nori). The rice acts as a foundation for the various fillings, allowing for a variety of flavors and textures. Sushi has become a global culinary phenomenon, appealing to a wide range of tastes.