1. Wasabi is ready for use after you mixed it with
    cold water with proportion 1:1in a vessel to
    make a paste, and then cover it for 3 to 5
    minutes.
2. Wasabi is spicy and easy to be volatilized, the
    flavor will gradually vanished when it is exposed
    to air for a long time. Please mix it with cold
    water for one time use, to avoid waste and
    keep fresh taste.
3. Never put wasabi powder and soy bean
    together before reaction with cold boiled water.