Chrystal Meth is becoming synonymous with gay men because of its popularity in the gay community, despite the fact that it is also widely spread among heterosexuals (particularly white) in rural areas in the US.
Having said the above, Crystal Meth, or Methamphetamine, was originally synthesized by a Japanese chemist in 1919. And there's no doubt - it is widely spread still in modern day Japan, and it is called Shabu on the street.
In Japan, Shabu is associated with an image of Yakuza: Yakuza, in this case, is a Meth dealer rather than a user. I think it is part of the Japanese police campaign to make Shabu synonymous with Yakuza so as to scare people off from using Meth. Yet, as a result, it is also hiding some facts. Many Japanese businessmen, housewives and students are hooked on Meth and this is not widely known to the public. At the same time, other facts, such as its use and harms, are also not well disseminated. Instead, the Japanese Meth users are criminalized as a result of association between Shabu and Yakuza.
By the way, Shabu-Shabu is a totally different thing: it is one of the expensive Japanese delicacies like Sushi and Tempura. You dip thinly sliced beef into a pot of boiling water, cook it till medium rare (or well-done) and dip into sauce (usually sesame-based or soy-sauce based). It is not known as widely as Sushi or Tempura, but it is really good and healthy. If you are in New York and want to taste it, give me an e-mail and I will let you know a really good Shabu-Shabu restaurant.