You'll find horseradish in the ingredient list. It's very spicy. In Europe, it is generally used to make barbecue dipping sauce, but mustard used in many Japanese food stores in China is like this. Sushi is very popular in Japan, and many sushi will have different sauces on it. For example, salad dressing, salad dressing is sour and sweet, so sushi will be rich in flavor. And some people prefer mustard, thinking that eating mustard will make them more energetic.
In particular, eating some sashimi or sushi with mustard will make people feel sobering. Generally, this kind is extruded from the seasoning tube and is a green paste. After eating it, there will be a spicy taste, which will rush from the nasal cavity to the forehead, making people unable to respond at the moment. Mustard is different from some condiments we usually eat. When we eat mustard, we feel very different. Some people will like it very much, while others can't accept it. But mustard is a very important seasoning in Japanese cuisine and sushi.
In fact, mustard is divided into yellow mustard and green mustard. Yellow mustard comes from China. It is mainly ground with mustard seeds and tastes very spicy. And it has a bitter taste, and is generally used as a seasoning for cold dishes. And green mustard, also called green mustard, originated in Europe. The main raw material is wasabi, that is, wasabi, and then some pigments are added to make it. This green mustard will be hotter than yellow mustard, and it will have a fragrance.