The Daikon Radish is a long, white, slender vegetable that is widely used throughout Asia. Daikon is a mild-flavored winter radish. How to Select: Skin should be skinny, firm, and smooth with crisp roots. Avoid radishes with cracks and bruises. How to Store: Wrap Daikon Radish tightly in plastic and refrigerate for up to 3 days. Nutrition: Daikon radish is very low in calories, fat-free, cholesterol free, and a good sources of vitamin C.