Dashi is Japanese stock, and Ichiban Dashi, this recipe, is used as a basis for soups, including miso soup, and in many other dishes. It doesn't taste fishy, but it does, to me, give everything a slight taste of the ocean (a bit like eating near a light ocean breeze). I have been practicing with the recipes in several English-language Japanese cookbooks and have consulted several Recipezaar members (thanks Mianbao and Akikobay!) and after some taste-testing, this method is what works best for me. You can vary the amounts depending on how strong you want to taste, and how strong the flavors of your particular ingredients seem to be.