[soraminazuki]

> It’s normal and unreported.

There is no question that victims of sexual crimes needs to be heard out more. However, your statement is an exaggeration to say the least. Groping is a frequent and well-documented topic on Japanese news. But as is often the case with sensational topics like crime, it is not as commonplace as you make it sound like.

I also doubt that the people around you were "unsurprised" to hear such things happening to your friend. It's just easy to imagine Japanese people displaying seeming indifference because of the sensitivity of the topic. At times, Japanese people can be reluctant to clearly express their opinions.