For months, Yata has been missing at sea. But the young man’s mother and brother refuse to believe he is dead. Yata’s brother, Ryota, enters a dance contest in the city in a vain attempt to win first prize―a sailboat, which he intends to use to search the South Seas for his brother.
Ryota meets his friend Nita and Ichino, and they head for the docks. They board a yacht, the Yahlen, and are threatened by the owner, a man called Yoshimura. Finally, Yoshimura relents and lets the three youths sleep aboard the yacht. But when they awaken the next morning, they are far from land. Ryota has taken the boat to look for his lost brother.
In a storm, the three youths learn that Yoshimura isn’t the yacht’s owner―he’s an escaped bank robber. The yacht is finally wrecked on an island where a secret organization called Red Bamboo has established a slave labor camp. The entrance to the island is guarded by a huge sea monster called Ebirah, which only the Red Bamboo can control.
Suddenly, a native girl named Daiyo appears. She leads the youths to a cave where Godzilla is sleeping. Daiyo claims to come from Mothra’s island, and tells Ryota his brother is living there now. The three youths decide to try free the slaves and raid the Red Bamboo base―which they discover is a secret nuclear bomb factory.
Ryota finds a helium air balloon and escapes to Mothra’s island, where he is reunited with his brother. Yoshimura, Nita, and Ichino decides to awaken Godzilla by making a lightning rod. A storm comes and Godzilla awakens to do battle with Ebirah and destroy the Red Bamboo base.
Mothra arrives in time to rescue everyone. As they escape, the Red Bamboo Commander detonates the reactor core. Only a timely warning from the humans enables Godzilla to escape before the island is engulfed in a mushroom cloud.
Monsters on Screen
Weapons in screen
- Jun Fukuda
- Shinichi Sekizawa
- Executive Producer
- Tomoyuki Tanaka
- Akira Takarada
- Masaru Sato
- Special Effects
- Eiji Tsuburaya
- Release Date in Japan