Of all of the Asian subway systems I've used, Tokyo was the most expensive and most complicated. The fact that there are 3 different rail systems that are not s

Of all of the Asian subway systems I've used, Tokyo was the most expensive and most complicated. The fact that there are 3 different rail systems that are not seamlessly integrated is a pain. Not necessarily their problem, but I also found some stations that were very hard to use for non-Japanese speakers. Still, this is almost certainly better than every subway network in the US.