Originally Posted by
railroadtycoon
Alternately you can purchase a PASMO (or Suica) card.
This is a transit debit card where you load funds onto the card and it is subtracted each time you use the trains (DisneyMonorail excluded).
Actually, the Disney Resort Line became a PASMO participant as of a couple of years ago, so both PASMO and Suica cards now work on the Disney monorail.