1. It can be purchased through the online platform, and generally there is a complete set of materials needed for sushi.

2. You can go to a physical store, such as a slightly larger supermarket, where they will be available.

sushi laver is commonly known as roasted laver, roasted laver; It belongs to Rhodophyta, Rhodophyceae. Algae are brown and purple, and consist of single-layer or two-layer cells, which are leaf-shaped, heart-shaped and band-shaped. The pseudorhizoid fixator on the lower part of wild laver is attached to the rock. The height can reach 2-3 cm.

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Sushi is one of the traditional Japanese cuisines. The main material is rice pieces seasoned with sushi vinegar and maintained at human body temperature, and fish, seafood, vegetables or eggs are used as ingredients, which are delicious and very popular among Japanese people. Sushi has been recorded in the heian period Code "Yanxi Style" completed in 927 AD.

Sushi at that time was a way to preserve fish. Rub salt on the fish, press it with heavy objects and let it ferment naturally. When it is sour, it can be eaten by wrapping it with crystal rice (the crystal rice should be repeatedly rolled after being cooked and cooled). According to Biography of Dongyi-Biography of Japan, Japanese people eat seafood, that is, sashimi, which is wrapped with rice grains to form a kind of fast food.

reference: Baidu encyclopedia sushi