If you loved Ghost Killer, try Devilman - Volume 1: The Birth
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.
What they share
Theysit in Action / Fantasy / Horror territory. If that's the register that drew you to Ghost Killer, the second film will land in a comparable space — through a different lens.
What Devilman - Volume 1: The Birth is
Tokyo. Night. Distant sirens. A shy teen merges with a demon to save humanity. The process transforms him into a being of terrible power. One hopes his old friend Ryo knows what he's doing. Worth a look for fans of 80s anime horror.
Ask 
ChatGPT
Claude
Grok
Le Chat
Perplexity
for a deeper bridge
ChatGPTClaudeGrokLe ChatPerplexity