Today is international sushi day.
Sushi (as we know it today) came from the earlier custom of wrapping salted fish around fermented rice.
It was popular in the Edo period (1603-1868) where traveling food stalls would sell fist sized balls of rice topped with raw and cooked fish.
Modern day sushi was invented by Hanaya Yohei (1799-1858) his sushi was smaller and could be eaten with the hands or chopsticks.
The word sushi actually refers to the rice which is dressed with vinegar and mirin. The different shapes have their own names, the most popular being makisushi (the tubes of rice with filling rolled in roasted seaweed), nigiri (blocks of dressed rice topped with fish) and gunkan (the same shape as nigiri but with a sheet of seaweed to keep the filling in).
Apparently the best way to eat sushi is to take the rice with your hands and dip the fish side into the soy sauce. It should then be placed in your mouth fish side down.
Happy Sushi day!