True story from a few years back:

Went to see a movie. Bought myself a ticket from the machine, with a student discount.
When I was about to go into the screening room,
a girl that was checking the tickets and IDs looked at my ticket and said:
“Oh, wait a second! Today is wednesday, and it is a ladies day.
You should have discount for that too!”
and she crossed the price over on my ticket with a pen and run away.
While I am waiting, I turn around and see the people waiting behind me.
They actually smile and nod.
And the girl comes back and hands me 400yen in change,

because she found out I payed too much.
It’s these the little things about people in this place that still keep me sane.