Every train station in Japan has a jingle. At first I thought it was one of many quirks of Japan (which it probably is). But then came to the realization it was possibly for those with impaired vision, so they can distinguish which station they are at by remembering the jingles. You may think "How can you remember a jingle?" Easy. The same way you can remember a song if you've heard it enough times. If a blind person usually makes the same journey or travels the same line day in day out, they'll come to recognize the jingles and be able to know which station they're at. They also act as a warning that a train is about to depart from the platform, because once the jingle ends, the subway doors close. It feels like a video game at some stations, because the jingles get faster and faster as the train readies to close its doors and depart. Japan is all about the helping and the safety.London transport should take note. Running to hop on a train in London dangerous. Especially if you don't know how long it's been sat at the platform for. Chances are you'll get the doors slammed in your face, or get your coat and or bag caught in the closed doors. Jingles for London train stations please!