It is the second of only two films to date to receive an R20+ rating in Japan, the other being Grotesco (2009).
The film has been banned in only 7 countries.
In the U.S., a heavily cut version was originally intended to receive an R rating, but was instead given an NC-17 rating by the MPAA. The uncut version of the film was never submitted to the MPAA.
The film was banned in Norway for sexual representation of children and extreme violence in a fictional medium. It's one of the few films banned in the country since Ichi, o Assassino (2001) and Grotesco (2009).
Was replaced with the film "Buried" at the Cannes Film Festival because of how disturbing it was.