The War of the Gargantuas
Original title: フランケンシュタインの怪獣 サンダ対ガイラ
Recommended from age 9. Giant monster devours humans.
Reason translated with AI from our Spanish original.
Good to know
- Scary scenes
- Frightening villains, monsters, transformations or jump scares.
- Fighting or violence
- Punches, weapons, injuries; slapstick barely counts.
High confidence
High confidence · All three models agree and know the movie well.
Where to watch
UK
Not on streaming services in the UK right now.
US
Included with subscription: 
Criterion Channel
Max
Free (with ads): 
Fawesome
Tubi
YouTube
Spain
Included with subscription: 
Filmin
Availability as of 18 October 2026. Data from JustWatch. Streaming data and logos: JustWatch.
TMDb user score
What it’s about
Gaira, a humanoid sea beast spawned from the discarded cells of Frankenstein's monster, attacks the shores of Tokyo. While the Japanese military prepares to take action, Gaira's Gargantua brother, Sanda, descends from the mountains to defend his kin. A battle between good and evil ensues, leaving brothers divided and a city in ruins.
Genres: Action, Horror, Science Fiction
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This product uses the TMDB API but is not endorsed or certified by TMDB. Streaming data: JustWatch.