If you've ever eaten at a sushi restaurant, then chances are you probably had an undesirable experience with a staple to the cuisine: wasabi.
This fiery, mustard-like condiment comes from a plant which grows along the beds of streams in mountain river valleys in Japan. Turns out though, it's not just grown in Japan.
At $160 a kilogram, wasabi is one of the most lucrative crops in the world, as the BBC's Kim Gittleson discovered in Vancouver. That's why farmers in Canada are hoping for a big payday from wasabi too.
Read the full story: Wasabi: Why invest in 'the hardest plant to grow'?