If you loved Hercules in the Haunted World, try Mahou Sentai Magiranger the Movie: Bride of Infershia
A bridge between a film you've already seen and one most people haven't. Mahou Sentai Magiranger the Movie: Bride of Infershia has roughly 7.6× fewer votes than Hercules in the Haunted World — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.

Hercules in the Haunted World

Mahou Sentai Magiranger the Movie: Bride of Infershia
What they share
Theyboth carry the atmospheric, dread, foreign gem, late night mood tags, and they sit in Adventure / Fantasy / Horror territory. If that's the register that drew you to Hercules in the Haunted World, the second film will land in a comparable space — through a different lens.
What Mahou Sentai Magiranger the Movie: Bride of Infershia is
Darkness falls over Infershia, a sinister bell tolls, Magitopian warriors descend. Shadows engulf Yamazaki, a phantom army stirs. Noboru Takemoto brings tokusatsu terror.