If you loved Rape Zombie: Lust of the Dead 4, try Eat the Schoolgirl: Osaka Telephone Club
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.

Rape Zombie: Lust of the Dead 4

Eat the Schoolgirl: Osaka Telephone Club
What they share
Both films are directed by Naoyuki Tomomatsu, and they both carry the body horror mood tag, and they sit in Horror territory. If that's the register that drew you to Rape Zombie: Lust of the Dead 4, the second film will land in a comparable space — through a different lens.
What Eat the Schoolgirl: Osaka Telephone Club is
Osaka, midnight, summer. A payphone flush with blood-red graffiti. A girl’s voice on the other end whispers about skin and sound. Two young cutouts split rent and yakuza snuff tapes. One rocks in front of a dial tone, twitching between his own filthy calls. The other records wet smacks over corpses, keeps a younger sister’s school photo taped to every wall. Naoyuki Tomomatsu pinches 90s J-horror cheapness until it gushes sticky.