
Hard mode Tokyo Metro (from May 2011)
Kanji overload! And very limited English on the terminal.
It was somewhat rare, but I did run into this situation a few times as a tourist dumb enough to venture outside of the regular tourist areas.
I think this is when I was still buying paper tickets and hadn't discovered how to use the IC cards yet. I'm pretty sure I overpaid and hoped for the best, or got ready to do fare adjustment on the other side.
Today IC card + Google Maps is such a game changer