Wasabi (わさび), Japanese horseradish, is a root vegetable eaten with many Japanese dishes. Many of you have probably seen wasabi in the form of a finely grated green paste with your sushi, sashimi, or soba (Japanese buckwheat noodles). But did you know that even in Japan, most of the wasabi eaten is, in fact, not “real” wasabi? Then what have you been eating all along?