Salad Dressings

Hi Maki,

I've tried a couple (and seen several others) of Japanese-style salad dressings I've bought from a Japanese grocery store that is not conveniently reachable for me... I have to travel over an hour just to get there. Might you be coaxed into suggesting a few recipes for dressings like Wasabi dressing, Sesame Dressing, Shoyu dressing etc that can be made at home?

Thanks in advance
Bell ^_^