Originally Posted by
lobsterdog
Even better would have been if the mapmakers had given each station a unique alphanumeric ID. Be careful if you're going to Shin-Nakano (M05) or Nakano-Shimbashi (m05) for example.
Anybody going to either of those two stations is most likely pretty aware of what they are doing and where are they going. And, if, as a tourist, you end up there, you have bigger issues than any alphanumeric signage system...