The primary ingredient in sushi is rice, specifically seasoned short-grain rice known as "shari." Sushi rice is typically prepared with a combination of vinegar, sugar, and salt, giving it a slightly tangy flavor. While sushi often features additional ingredients like fish, seafood, vegetables, and seaweed, the rice serves as the foundation for the dish. Sushi comes in various forms, including nigiri (slices of fish on rice), maki (rolls wrapped in seaweed), and sashimi (slices of fish without rice). The careful preparation and balance of flavors in sushi reflect an important cultural tradition in Japanese cuisine.