Comment by kelnos

There are still significant gaps. I was heading from Narita to Shinjuku about a year ago, and after I got off the Narita Express, I realized my Pasmo card (which I hadn't used in about 8 years) didn't have enough on it to get me the rest of the way. There were two ATMs I could find in the (reasonably-sizeable) train station, and neither accepted my US-issued VISA debit card. I had to walk down the street to -- of course -- a 7-Eleven to use the ATM there.

During the rest of my week and a half there, I saw plenty of other ATMs that appeared identical to the ones in the train station that didn't work for me.