The War of the Gargantuas

フランケンシュタインの怪獣 サンダ対ガイラ

Also known as Katango, Furankenshutain no Kaijū: Sanda tai Gaira, Ο Πόλεμος των Γκαργκαντούας, Τέρατα από Χαμένους Πλανήτες, Frankenstein's Monsters: Sanda vs. Gaira

“A crisis, striking from the mountains and the sea! Greater Tokyo is the battlefield of death!”

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.