“Nigiri sushi, a slice of fish on a small mound of rice, was invented in Edo (now Tokyo) in the early 1800s as a fast food sold at street stalls.”

Reference: Encyclopaedia Britannica

More food facts

A praying mantis will eat a black widow.

Sushi started as a way to preserve fish by packing it in fermented rice. People ate the fish and threw the rice away.

Greater Tokyo is the largest metropolitan area in the world, with about 37 million people.