I came across this board and was very surpised to see the discussion of wasabi and well as the name of our company Pacific Farms. ALL forms of wasabi on the market regardles of the country they come from are imitiation. Even though the word "wasabi" is on the label it is made from dried american horseradish and large amounts of food coloring. Our product does have a very small amount of food coloring in it because the rhizome oxidizes when exposed to air and turns to a blackish color similar to an avocado.
I do not wish to cause any anger or ruffle feathers, I though this would be a good place to help spread the word about imitation wasabi and help the public learn that they have been dubbed for many years.
To learn more about the true wasabi japonica please check our site at http://www.freshwasabi.com. There is a trove of information including receipes for the public to use.