In separate bowls, soak the shiitake, dried daikon and lotus root slices in hot water just to cover for 10 to 20 minutes. Reserve the soaking waters from the vegetables and combine to equal 1 1/2 cups liquid. Remove stems from the shiitake, discard and slice the caps. Chop the daikon and lotus root.
Place the shiitake, dried lotus root, dried daikon and carrots in a saucepan. Add water to almost cover the ingredients. Cover and bring to a boil. Reduce the flame to medium-low and simmer for 20 minutes. Add shoyu, cover and simmer 5 minutes. Remove cover, add green onion and sweet corn, mix and cook 2 to 3 minutes until most of the remaining liquid is gone.
Per serving - 133 calories, 0 g fat (0% calories from fat), 4 g protein, 28 g carbohydrate, 9 g fiber, 0 mg cholesterol, 296 mg sodium