Sushi was originally invented as a means of preservation, when fermented rice was used to store fish for anything up to a year. This was known as narezushi, and in fact the rice was thrown away and only the fish consumed. A later variant called namanarezushi, invented in the 16th century, introduced the idea of using vinegared rice, which was consumed instead of being thrown away, and this is still enjoyed today, particularly in Japanβs ancient capital, Kyoto. It was not until the Edo period (1603-1868) that what we recognise as sushi today became popular in Japan, complete with little boxes filled with nigirizushi, sold on the street by vendors.