Do wewe think that Japan's railway stations have problems like what is found in the series?

Probably not, as in reality Japan's railway security is really tight. Also, the people there aren't that stupid to do all these things.

Well for one thing I know is that their railway stations are clean, efficient, on time (the trains I mean) and the security also carry weapons with them (I saw one carrying a fully automatic SMG!). So it's not likely stuff like a bomb in the station is going to happen.

No, this is an Alternate History Story.