1. Prepare dashi with soy and mirin according to package directions. Keep warm.
2. In a deep pot or fryer, heat the peanut oil to 350 F.
3. Meanwhile, in a mixing bowl, blend the egg yolks and water. (For a thinner batter, which I prefer, use more water, or vice versa.) Sift the flour into the batter and stir gently to combine.
4. Dip the eggplants into the batter, one at a time, shaking off excess. Fry in the hot oil until golden brown and drain on paper towels. Repeat with the tofu pieces.
5. In each of the 8 serving bowls, place 5 small pieces of ginger. Ladle in 1 cup of the hot broth, an eggplant, and tofu. Sprinkle with the green onions and serve hot.