Which essential condiment is also known as Japanese horseradish?

The story behind the answer

Wasabi is correct because it’s the pungent green paste made from the rhizome of Wasabia japonica (Eutrema japonicum), a plant in the mustard family. Its sharp “nasal heat” comes from allyl isothiocyanate—the same compound that makes horseradish and mustard fiery—hence the nickname “