Most wasabi powder is coloured horseradish with other additives, flavorings and colorings.You get the occasional powder which is the true 100% Wasabia japonica powder. They are shown below in bold.You have to mix these powders with water before it can be used.Namida Wasabi Powder Reviewers Recommendation – Awesome Product!Clearspring Wasabi PowderSushi Chef Wasabi (Powdered Horseradish) PowderEden Wasabi PowderKaneka Wasabi Horse Radish PowderSushiNow! All Natural Wasabi PowderSanchi Wasabi PowderSushi Sonic Real Wasabi (100%)Sushi Sonic Real Wasabi (46%)Orchids Wasabi Powder 2.0 Oz