eat-japan.com

oRxB8 TIL that the earliest form of sushi, known as narezushi, was made by fermenting fish with rice and salt for preservation. It wasn't until the 19th century that the sushi we know today, such as nigiri sushi, was invented by a Tokyo-based chef named Hanaya Yohei.
BgdJW TIL Sushi was invented in China, not Japan, and was a way of preserving fish in salt.
kOA41 TIL that “sushi” doesn’t mean “raw fish”. It actually refers to a dish of vinegared rice served with various fillings and toppings, which may include raw fish.