ビジターQ

The name of this movie is ビジターQ released in 2001-03-17 and it's main theme is A father, who is a failed former television reporter, tries to mount a documentary about violence and sex among youths. He proceeds to have sex with his daughter who is now a prostitute, and films his son being humiliated and hit by classmates. Q, a perfect stranger, somehow gets involved and enters the bizarre family whose son beats his mom, who in turn is also a prostitute and a heroin addict..