Which spice gives wasabi peas their characteristic heat?

Wasabi gives wasabi peas their characteristic heat.

Wasabi peas are usually roasted or fried green peas coated in a crisp mixture flavored with wasabi. Authentic wasabi comes from the grated rhizome of Wasabia japonica, now classified as Eutrema japonicum. Commercial snack coatings often use horseradish, mustard, green coloring, and wasabi flavoring because genuine wasabi is expensive and difficult to cultivate.

The sharp sensation from wasabi is different from the burning sensation of chili peppers. Wasabi’s compounds stimulate receptors in the nose and mouth and produce a brief, volatile heat. The snack is commonly served in Japan and has become an international accompaniment to drinks and sushi-style foods.