Originally Posted by
NewbieRunner
JR East station maps are available in English as well and I find them reasonably easy to follow.
http://www.jreast.co.jp/e/stations/
However, Tokyo Metro station maps are another matter. They are in Japanese only and interesting to look at but I don't find them easy to follow. Here's one for
Nihonbashi station.
Taking a glance at the Tokyo Metro link, I deem it to be gratuitously detailed. Though I do like how exits are well numbered/marked, making it easy to tell a mate where to meet- so long as it's not in front of ハチ公.