The most popular type of sushi today, nigiri-zushi originated as a fast-food dish in Tokyo. Consisting of a piece of seafood put onto a small ball of rice, it takes much less time and effort to prepare than more traditional sushi dishes. Nigiri-zushi are served at all sushi restaurants from inexpensive conveyor belt sushi to Michelin-starred restaurants. Tsukiji Fish Market is one of the best places to eat fresh sushi.