In the Japanese language, the characters for "wafu" are East-West. This dressing is a western-style cream based dressing with an eastern flair...hence it is known as a "wafu dressing" or "East meets West Dressing." In short, this is a Japanese-esque recipe for salads and dipping that I've been making for over 20 years. For some reason, most savory wafu recipes (dressing or not) combine the flavors of soy and sesame oil. I actually like the combination here! The original recipe calls for making the mayonnaise from scratch and then adding the other ingredients. I prefer making this using commercial mayo because I the kids will go through quarts of the stuff on their salad. I usually double the recipe to last us a week. It's almost a crime, but very tasty to dip california rolls into this. Just do it secretly, and it'll be fine.
Actually, "wafu" does not mean east meets west. It means "Japanese style". East/west would be wayo - wa for Japanese and Yo for European or Western. Wa is the character for Japanese, and fu is the character for "style". or "in the style of" fu is also the character for wind.