One of the biggest pain in the asses when you're out late at night with friends in Japan is the rush to catch that last train at 1am. After that, you're stranded until 6am with no trains running and most businesses shuttered. Sometimes you can find a bar that'll be open to keep you occupied until you can find your way home, but you'll be piss-ass drunk as a result.
But that's the way things are in Japan, for better or worse.
So it comes to me as a bit of a surprise to hear that the Tokyo government is considering running the Toei Chikatetsu 24 hours a day, due to the increasing number of flights coming into Haneda airport in Tokyo at all hours of the night. I's a much more attractive option than a $60 cab ride in or something of that nature.
This would certainly change some of the cityscape of Tokyo, although I couldn't really say how. I suppose I'll leave that commentary up to Dale. In the largest city of a country with 200% of its GDP in debt, they could use the jobs that this change could create.