Wasabi horseradish is used in Japan with sushi and sashimi as well as with other meals such as cold soba noodles. Wasabi is derived from the root of the wasabi plant which requires very clean, fresh water to grow well. The mountains of the Japan Southern Alps receive abundant rainfall and this area is perfectly suited for growing wasabi. Farmers in these high mountains have for centuries grown wasabi in terraced fields similar to rice paddies, however wasabi fields are normally situated much higher in the mountains than rice fields. While hiking in the mountains here it is not uncommon to find small wasabi farms situated along the narrow course of fast running streams or at the base of cascading waterfalls. (less info)