Sushi is the most famous Japanese dish outside of Japan, and one of the most popular dishes among the Japanese themselves. In Japan, sushi is usually enjoyed on special occasions, such as a celebration.
During the Edo period, "sushi" refered to pickled fish preserved in vinegar. Nowadays sushi can be defined as a dish containing rice which has been prepared with sushi vinegar. There are many different types of sushi. Some popular ones are:
Note that "sushi" becomes "zushi" in word combinations in which "sushi" is the second word, e.g. nigirizushi.