Abnormal Blood

日本暴行暗黒史 異常者の血

Also known as Histoire de la violence de l'underground japonais: le sang de l'homme étrange, Nihon bôkô ankokushi: Ijôsha no chi, Dark Story of a Japanese Rapist, 日本暴行暗黑史：异常者的血

A detective investigating a serial rapist discovers that he and the perpetrator come from the same lineage of depraved individuals, a genealogy of violent and sexually perverse deviants that stretches through the Meiji, Taisho and Showa eras and can even be traced back to the Edo era.