The wasabi served with your sushi is often just a mixture of mustard, horseradish and green coloring. Authentic wasabi is difficult to grow, mainly in Japan, and now in Israel too. Ran Ronen cultivates the plant in his greenhouses on Moshav Eliad in the Golan Heights, selling it to up-market restaurants and online.
https://www.israel21c.org/man-takes-a-spicy-gamble-growing-wasabi-in-israel/