Miso-Ginger Dressing

There used to be this cool little working-class sushi bar near my house called "Sushi Seiha" that served a miso dressing that I think is similar to this one. I'll bet many sushi joints serve something like this but Seiha was my first real introduction to sushi and miso dressing.

1/4 cup white miso
3 T rice wine vinegar
1 T ginger (finely grated)
1 1/2 tsp. sugar
1 T sesame oil
2 T vegetable oil
1 T water

Whisk everything except oils and water, either by hand or with a blender. Add oils in a thin stream and then add water. Thin with more water if desired.