I found that once you work out the Tokyo subway system, it's very good. Everything now is also in English, and the directional signs at the stations are excellent.
When I first went to NY, you still had the 3 different subway operators, IRT, BMT, and IND, often with separate entrances. This made the stations and signs very confusing, and the Subway map was a classic, in successfully confusing you! I still have one of those maps from 1978. Now, things are much better, I think, though there are still some issues.
I also wonder why the NY Subway cars are built to provide maximum internal noise! I wonder if they leave all the screws loose, to achieve maximum rattling? Tokyo Subway trains are a pleasure, by comparison.