Combine the ingredients for the vinaigrette in a small jar and shake well.
Cook the noodles as package directs. Rinse, drain and plunge into ice water. Drain again and place in a bowl. Add the dressing, carrot, daikon and scallions. Toss to mix. Season with additional shoyu, if desired.
Per serving - 245 calories, 7 g fat (25% calories from fat), 8 g protein, 38 g carbohydrate, 2 g fiber, 0 mg cholesterol, 275 mg sodium