Violence Jack: Harlem Bomber-hen
English name: Violence Jack: Slumking
Genres: Action, Drama, Horror
Type: OVA, Episodes: 1
Aired: Jun 5, 1986
Studio: Ashi Productions
Source: Manga
Rating: R+ - Mild Nudity
Synopsis:
Kanto Hell Earthquake has demolished the metropolitan completely. After the earthquake, Slum King is kidnapping girls and sell them as sex slaves. Mari is wandering on the devastated field looking for her lover, Ken. But she is also kidnapped by them. While she is tortured and trained as a sex slave, Ken saves her. Ken has become the member of Slum King. The king offers condition to him; in return for releasing her, he has to kill Violence Jack. 

(Source: AniDB)