The JR station I live closest to is a very small local station. A lot of trains just whiz by and don't stop at this little station. When I am trying to return home, I need to make sure to get the local train, not the fast express that doesn't stop at my station. One evening when I was waiting at another station to come home, I noticed the train I was waiting for was (in katakana) wa n ma n (sounds like one man). I had no idea what that meant. When the train arrived, I understood! There was only one man driving the train, taking the tickets, making the announcements, everything. There is one door to get on the train, and one door to get off - the one closest to the front of the train, where the driver is. I love living in Japan!