The War of the Gargantuas (1966) is a Action, Horror, Science Fiction film that follows 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. Currently, you can watch The War of the Gargantuas on YouTube TV, Criterion Channel, HBO Max. Streaming availability may vary by country and platform over time. It has a user rating of 6.4 out of 10 from 105 votes. Fans of action movies may also want to explore similar titles below.