Sushi is a seaweed roll filled with cooked rice, raw or cooked fish, and vegetables. It’s commonly served with soy sauce, wasabi, and pickled ginger.
Sushi first became popular in 7th-century Japan as a way to preserve fish.
The cleaned fish was pressed between rice and salt and allowed to ferment for a few weeks until it was ready to eat.
Around the middle of the 17th century, vinegar was added to the rice to reduce the fermentation time and improve its taste.
The fermentation process was abandoned in the 19th century, when fresh fish started being used instead. This gave rise to an early version of the ready-to-eat sushi to which you’re accustomed today.