- HD 1080
- Runtime: 88m.
- Status: Released
- 0
- Languages: ja
- Country: Japan, United States of America
- Director: Ishirō Honda
- Stars: Russ Tamblyn, Kumi Mizuno, Kenji Sahara, Nobuo Nakamura, Jun Tazaki
- keywords: monster, airport, octopus, giant monster, sequel, kaiju, man eating monster
- Production_studio: TOHO, Benedict Pictures Corp., United Productions of America, Henry G. Saperstein Enterprises Inc., Tokyo Laboratory
- Slogan: A crisis, striking from the mountains and the sea! Greater Tokyo is the battlefield of death!
- providers: Max, Max Amazon Channel, Criterion Channel
- The The War of the Gargantuas is featured in the top rankings of 1966
- #17 in Top Action Movies of 1966
- #8 in Top Horror Movies of 1966
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.