modern form of sushi is believed to have been created by Hanaya Yohei, who invented nigiri-zushi, the most commonly recognized type today, in which seafood is placed on hand-pressed, vinegared rice. This innovation occurred around 1824 in the Edo period (1603-1867). It was the fast food of the chonin class in the Edo period.

Sushi is traditionally made with medium-grain white rice, although it can