Green mustard/yellow mustard, the raw material of green mustard is wasabi, and the raw material of yellow mustard is mustard seed. Although the raw materials are different, they are all spicy seasonings. Green mustard is not only used with sashimi, but also commonly used in Japanese cold dishes to provide a little spicy taste for cooking. Yellow mustard is also used to make cold dishes in China cuisine. If you want a little spicy taste and don't want to use Chili, you can consider green mustard and yellow mustard. Personally, I think green mustard is refreshing and spicy, while yellow mustard is relatively mild.