With its zero-tolerance cannabis laws, deep social stigma against the drug and moves to tighten rules on consumption, Japan is no stoner's paradise. But you wouldn't guess it watching Ai Takahashi and her friends twerking, body-rolling and lighting up to the weed anthem "Young, Wild & Free" at a tiny, packed club in Tokyo. What they're smoking isn't illegal marijuana, but a joint containing cannabidiol (CBD) -- a non-intoxicating component of cannabis that has become trendy worldwide, and is fast catching on in Japan. IMAGES AND SOUNDBITES