Sun-Dried Shiitake Mushrooms are far superior due to the fact that they are the highest grade of all shiitake and are also sun-dried giving them 20% more vitamin D than other donko. Mitoku Sun-Dried Donko Shiitake are superior quality mushrooms that are hand-harvested at their peak of vitality, then carefully sun-dried; concentrating their exquisite flavor and goodness. Use with their soaking water for superb soups or sauces, or add to stir-fries, fried rice, noodles or casseroles.