Asian salad dressing recipe?

I want the recipe for the salad dressing that they serve at most hibachi grills. I have tried many recipes but none of them are right. Does anyone have it?Asian salad dressing recipe?
I can tell you how to make a Tahini dressing, not the gingery one (which is more orange).

Get a jar of Tahini (sesame butter) and put about half of it in a mini food processor, add the juice of 2 lemons, 1/2 tsp salt, 2 T virgin olive oil and 1 T of sugar (optional 1-2 cloves of raw garlic). Add water to the mix and work it in until it has the consistancy of a thick salad dressing, not peanut butter.