From the Japanese words dai (large) and kon (root), this vegetable is in fact a large Asian radish with a sweet, fresh flavor. The daikon's flesh is crisp, juicy and white, while the skin can be either creamy white or black. It can range from 6 to 15 inches in length with an average diameter of 2 to 3 inches. Some exceptional daikon are as fat as a football. Choose those that are firm and unwrinkled. Refrigerate, wrapped in a plastic bag, up to a week. Daikon radishes are used raw in salads, shredded as a garnish or cooked in a variety of ways, such as in a stir-fry.