Before heading off to Japan, you should take a few things with you. if you get a data plan in Japan we would like for you to download Google MAPS.
https://itunes.apple.com/us/app/google-maps/id585027354
https://play.google.com/store/apps/details?id=com.google.android.apps.maps
with Google MAPS you can be directed to any location and a general cost of the train tickets.