Delivery Health, or deriheru in Japanese shorthand, translates to sex delivery service or, in more polite words, escort service. This is how it works: trawl the net or leaf through the back pages of Japanese porn magazines and look out for advertisements by Delivery Health agencies. Putting デリバリーヘルス into Google will net you about 880,000 hits. Not all of them are agencies but there are quite a few in the opening pages. Accordingly, the services also leave (almost) nothing to be desired. With one big exception: full intercourse. No legal agency will offer it. The prostitution laws are very strict in that regard.