Walking along Tottenham Court Road on a recent, rare, trip to London I was struck by a sweet, pungent odour, which I couldn’t immediately identify. The answer arrived moments later while cutting through a dark Dickensian alley en route to Oxford Street.
My way was blocked by a group of wild-eyed, ragged looking men, all smoking marijuana. It was like a scene from Michael Jackson’s Thriller video, except genuinely scary. The men were staring at me as if I were a trespasser. Concluding that proceeding with my shortcut was probably unwise; I turned on my heels and took the long way round.
The reason I had forgotten that distinctive aroma is simple: I’ve lived in Tokyo for the last 20 years. In all that time I don’t think I have ever smelt marijuana, even in my earlier more socially active days in the grungier parts of Roppongi or Shinjuku. And I have never felt afraid walking around the city.

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