First, most Japanese food stores don't sell imported ingredients.
In fact, most Japanese food stores do not sell imported ingredients. On the Internet, there are many shops that specialize in supplying these Japanese food stores. From semi-finished products to finished products, the price is not expensive. For example, the baked eel rice that many people like to eat sells semi-finished products. When you bring it back, you can heat it with a baking gun and serve it. It tastes good. There are also some side dishes such as seaweed, fish eggs and sushi shaking hands, which are actually semi-finished products. There are many shops, and they are sold very cheaply.
Besides, imported salmon is expensive, so it is impossible to eat imported ingredients for a few dollars at ordinary times. This fresh thing needs to be sent by air quickly, and the cost is quite high. /kloc-more than 0/00 yuan can't buy fresh salmon from Hokkaido at all, but this kind of salmon is frozen or farmed in China, so most people can't taste it at all, and those who can taste it won't go to this store.
Second, imported things are very expensive, and cheap shops can boldly eat them.
Things imported from Japan are actually very expensive, but most shops will not import them, so some Japanese self-service shops and cheap self-service shops on the market can safely eat them. There are not so many ingredients in nuclear radiation areas, but they are all planted in our country. Whenever I see the ingredients produced in the nuclear radiation area, either the suppliers above are uneducated and ignorant, or the boss blindly posts them for the sake of being more authentic.