Kewpie also makes a wasabi mayo that is much harder to find, but well worth the $$.I'm not familiar with that either, but I am willing to spend a wee bit extra for good mayo. Case in point: Kewpie from a good Asian store. Pricey but well worth it for the umami kick. World Market sells it but from my experience, it has to be an Americanized version that lacks the magic of what you can get at a legit Asian market. I too hope you grab some and report back. It could be a civic duty of sorts! :-)