I only found these two articles (reposts) for the English content about sushi you want. The words and sentence structures are not complicated, so you should be able to understand them. I hope it will be helpful to you.

Introduction to Sushi:

Sushi (Sushi, Sushi?) is a kind of food. Sushi comes from Japan, and has a long history. It's a popular dish in America, the UK , and many other countries.

Sushi is made with rice. All types of sushi have some kind of rice. The rice is mixed with vinegar. There are other things in it like vegetables and raw fish called "neta ". Some sushi is wrapped in seaweed (sometimes called "nori"), some is not. Some kinds of fish are safe to eat raw, and do not make people ill.

There are different kinds of sushi . Nigiri sushi is made with fish or vegetables that are put on top of sushi rice. Maki sushi is made with fish or vegetables rolled up inside rice.

Sushi can be eaten with hands or chopsticks. Soy sauce, wasabi, gari (sweet, pickled ginger), and other toppings are often put on sushi.

In Japan, sushi is sometimes sold in “conveyor-belt shops”, where plates of sushi are put on a moving belt which passes by the customers. People freely take the sushi they want as it passes. The color of the plate shows the price of the sushi. At some shops, any plate is 100 yen.

Sushi History:

Main article: History of sushi

Sushi by Hiroshige in Edo periodThe traditional form of sushi is fermented fish and rice, preserved with salt in a process that has been traced to Southeast Asia, where it remains popular today[citation needed]. The term sushi comes from an archaic grammatical form no longer used in other contexts; literally, "sushi" means "it's sour

",[2] a reflection of its historic fermented roots.

The science behind the fermentation of fish packed in rice is that the vinegar produced from fermenting rice breaks the fish down into amino acids. This results in one of the five basic tastes, called umami in Japanese.[3] The oldest form of sushi in Japan, Narezushi still very closely resembles this process. In Japan, Narezushi evolved into Oshizushi and ultimately Edomae nigirizushi, which is what the world today knows as "sushi."

Contemporary Japanese sushi has little resemblance to the traditional lacto-fermented rice dish. Originally, when the fermented fish was taken out of the rice, only the fish was consumed and the fermented rice was discarded . The strong-tasting and -smelling funazushi, a kind of narezushi made near Lake Biwa in Japan, resembles the traditional fermented dish. Beginning in the Muromachi period (AD 1336–1573) of Japan, vinegar was added to the mixture for better taste and preservation. The vinegar accentuated the rice's sourness, and was known to increase its life span, allowing the fermentation process to be shortened and eventually abandoned. In the following centuries, sushi in Osaka evolved into oshi-zushi. The seafood and rice were pressed using wooden (usually bamboo) molds. By the mid 18th century, this form of sushi had reached Edo (contemporary Tokyo).[4]

The contemporary version, internationally known as "sushi," was invented by Hanaya Yohei (花屋和卫; 1799–1858) at the end

of Edo period in Edo. The sushi invented by Hanaya was an early form of fast food that was not fermented (therefore prepared quickly) and could be eaten with one's hands roadside or in a theatre.[4] Originally, this sushi was known as Edomae zushi, because it used freshly caught fish in the Edo-mae (Edo Bay or Tokyo Bay). Though the fish used in modern sushi no longer usually comes from Tokyo Bay, it is still formally known as Edomae nigirizushi.