One of the problems Japan is facing is the problem of train gropers, who typically take advantage of the fact that Japan’s trains can get insanely crowded and they use that to their advantage to molest and grope their victims. Unfortunately, there is not much one can do about it as trains can be too crowded to correctly identify the groper.
Plus, due to the nature of trains, the groper can always easily hop off the next station and disappear. However, Japan Railways (JR East) has come up with a new app that will help the victims out. Whenever the victim thinks that they might have been groped, all they need to do is launch the app and tap the button, after which it will send a message to the train’s conductor.