Also @Fullbuster have you ever been to japan? Every country has it's problem, paedophilia is of japan.
http://content.time.com/time/world/article/0,8599,2054271,00.html
https://www.bbc.co.uk/bbcthree/article/57eaaf23-0cef-48c8-961f-41f2563b38aa
It's like school shootings in america. Rare in vacuum, but still much more than other developed parts of the world to make it a problem. I am not going into anime here as that will be too easy.