- HD 1080
- Runtime: 79m.
- Status: Released
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- Languages: ja
- Country: Japan
- Director: Yoshiyuki Kuroda
- Stars: Yoshihiko Aoyama, Akane Kawasaki, Takashi Kanda, Hideki Hanamura, Chikara Hashimoto
- keywords: vampire, shapeshifting, demon, ghost, jidaigeki, youkai, little girl in peril, yokai, monster mash, kappa, rokutokubi
- Production_studio: Daiei Film
- Slogan: The most bizarre monsters the world has ever seen!
- providers: AMC+ Amazon Channel, Shudder Amazon Channel, Shudder Apple TV Channel
- The Yokai Monsters: Spook Warfare is featured in the top rankings of 1968
- #7 in Top Fantasy Movies of 1968
- #14 in Top Horror Movies of 1968
When a Babylonian vampire comes to old Japan, an army of Japanese demons and ghosts gather and battle him.