Funny, had a similar discussion in a private forum on another board recently. Check out this site: http://www.fuzoku-townpage.com/ These are all outcall (deriharu, or delivery health) services, featuring pretty much exclusively K-gals. Service levels, quality, etc are all over the map.

Since many girls who come to America previously worked in Japan, it's no big stretch to rebrand them as Japanese; especially since they're essentially the same stock ethnically. As a historical note, the Yakuza got out of the storefront AMP business in the early '80s in the USA; the Koreans, who were much better organized, taking over.

Anyway, enjoy the eye candy...who knows, some of them may be showing up on these shores a year or two or three from now.