Heat a cast iron or heavy stainless steel skillet over a high flame, add the mochi, reduce the flame to low or medium-low and cover the skillet. Let cook for 3 to 4 minutes. Flip the mochi over and cook 3 to 4 minutes or until the mochi puffs up. Remove from the skillet. Eat as is or wrap nori around each piece of mochi. Place the daikon, shoyu and water in a small dipping bowl and mix. Dip the mochi into the dip when eating.
Per serving - 128 calories, 1 g fat (7% calories from fat), 3 g protein, 28 g carbohydrate, 2 g fiber, 0 mg cholesterol, 305 mg sodium