@kevin282819 Groping in train cars because of how excessively busy they are, and thus easy to get away with, is a big problem in Japan. However groping happens a lot in all countries. The only reason it's talked about in the context of Japan is because of how little other crimes are being committed. In the US you don't hear about the gropings, because they are too busy covering all the mass shootings that happen.
Japan is ranked in the top 10 for lowest crime rate and highest safety index scores. So yes, it's fine if a kid walks around in Japan, just like it's fine in the Netherlands or any really safe country with a low crime rate for that matter.