Convenience & simplicity aside, how expensive is it? Not necessarily compared to driving, but just in general. When I went to Japan a long time ago, I remember being kinda shocked at the cost compared to the JR Pass for tourists (which included the Shinkansen), but part of that was to give tourists a huge incentive to spend some money outside of Tokyo, I'm sure, but I remember some fares feeling expensive for people just to head into the city for a night out...