Wasabi is a spice traditionally prepared from a plant from the cabbage family. Its root is used as a spice and has a very strong flavor. The root is smashed up into paste and used as a condiment. Its hotness is more like hot mustard or horseradish than chili pepper, because it irritates the nose more than the tongue. Eating too much wasabi can cause a very painful feeling in the nose. The plant grows naturally in Japan. It is often eaten with sushi.
Because the wasabi plant is so hard to grow, real wasabi is very rare and expensive, most wasabi is a green paste that is really made from horseradish, mustard and food coloring. 
Wasabi is also known for how spicy, or hot it is.
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- "Wasabi: Why invest in 'the hardest plant to grow'?". BBC News. 2014-09-17. Retrieved 2020-11-07.