Fresh and pure wasabi is hard to find, hard to grow, and is usually only served in Japanese restaurants. Since the taste of wasabi only lasts for 15 to 20 minutes, it is grated on the spot. Although labeled as wasabi, the ones we find in the market are not real. Instead, it is replaced with horseradish which has a similar spicy taste to wasabi and the flavor lasts longer. It’s a great alternative since it is readily available and not as expensive as the real wasabi.