Last year I was waiting for a train at Ochanomizu station and I heard a funny jingle when the train was approaching; it was so funny that another Gaijin nearby danced a couple of seconds.
I thought then that the jingle was randomly played, since I heard several jingles in the stations. Until recently, when someone asked me about the different jingles in each station, I recognized that they weren’t randomly played. It happens to be that each station has its own jingle, sometimes related to something in the area (at least that was a coworker told me).
However, after I started paying attention, I noticed that some jingles may correspond to a line or even to the direction of the train approaching. Either way, I started to notice that I feel very related to the main jingle of the Yamanote line as well as to the one of the Shinanomachi station; the Yamanote line is perhaps the line I ride at most, and the Shinanomachi station is the closest to my place. Some jingles are very distinctive and popular, like the one for the Ebisu Station from the The Third Man.
I found this site, apparently made just for fun. When the mouse clicks over a station in the Yamanote line, the announcing voice can be heard, unfortunately not the jingles.
In this clip it is possible to hear a lot of the jingles of the JR stations in Tokyo. Same jingles can be downloaded here, and can be used as ringtones or whatever.
In this article there are a couple of jingles to be heard online from the JR Yamanote and Keihin-Tohoku lines.
yamanoterider 