1, sushi spread in China more than 800 years ago (that is, in the post-Han era) and was introduced to Japan in 700 AD. At that time, some business travelers pickled rice balls with vinegar, added seafood or meat, and pressed them into small pieces as food along the way. Later, they spread widely in Japan. At that time, people were stabbed with various ingredients, known as "Edo Sanlu", also known as "holding deer", which is the most popular sushi at present.
In modern Japanese sushi, there are two kinds of sushi: roll sushi and box sushi. "Roll" is rice, cucumber, tuna, eggs and pickled radish wrapped in seaweed. "Curly" can be divided into two types: too big and too thin. As the name implies, there are differences in size.
"Box Sushi" is named after rice is put in a wooden box, covered with various ingredients, pressed by pressure, and then the wooden box sushi is taken out and cut into pieces. "Handroll" is actually a kind of "roll". It is said that in the18th century, those Japanese gamblers wandered around Tiejia Mountain all day, excited and afraid of starvation, so they put tuna meat in rice and rolled it up with purple vegetables. Eating with a big mouth can kill two birds with one stone, and it can also prevent rice grains from sticking to poker and fingers, so it is very popular among gamblers. This food was born in the casino, so it was named tekkamabi, and gradually evolved into today's hand roll.