YouTube - Rape Club - Japan
I never heard anything about this scandal... even my friends at the Waseda university never heard about it, and told me this is just an urban legend.
But the video talks about police investigations, and some people were arrested...
I don't actually believe in an organized "rape club" that organized shows and parties just to see all the girls getting drunk, then choose one victim to be raped... but it's not difficult for me to believe that some maniacs could attend parties just to find some drunk gals to abuse, so in my opinion this video could be true.
Anyway, I firmly believe that rape is the most ignominous crime.