Fight- Mothra/Rodan and Ghidorah
Weapons-Throwing rocks, Atomic Breath
News reporter Ichiro Sakai and photographer Junko Nakanishi take pictures of the wreckage caused by a typhoon, uncovering a large scale in the debris. Later that day a giant egg is discovered on the shore. The local villagers salvage it, and scientists come to study the egg.
While Sakai and Junko try to ask Professor Miura, one of the scientists, questions about the egg, an entrepreneur of Happy Enterprises named Kumayama scurries the scientists off and explains that he bought the egg from the local villagers. Instead of letting scientists study the egg, Kumayama wants to make it into a large tourist attraction. Sakai, Junko, and Professor Miura are disgusted and believe that Kumayama has no right to keep the egg.
While the three are discussing the egg at a hotel, they discover Kumayama checking in. Sakai wonders if somebody else may be working with Kumayama and investigates the matter. Kumayama meets with Jiro Torahata, the head of Happy Enterprises. As the two are discussing the billion-dollar tourist attraction the egg represents, two tiny twin girls known as the Shobijin, interrupt them. The Shobijin explain that they are from Infant Island and that the egg belongs to their god Mothra, who lives there. Torahata and Kumayama ignore the girls' pleas and try to capture them. The Shobijin escape the room and meet with Sakai, Junko, and Professor Miura outside the hotel. The girls beg them to bring the egg back too and the three promise to try as hard as they can to bring the egg back to Infant Island. The girls explain that if the egg is not returned, a larva will hatch and will cause destruction to its surroundings as it searches for food. When confronted by Sakai, Junko, and Miura, Kumayama offers to buy the Shobijin, disgusting Junko, Miura, and Sakai.
The Shobijin leave even though they could not get the egg back and thank Sakai, Junko, and Miura for their kindness. Sakai tries to write editorials but they fail due to lack of public interest. When the scale is found to be radioactive, the three test for radioactivity in an industrial area where it was found. The mutant dinosaur Godzilla suddenly emerges out of Kurada Beach, where he had been blown ashore by the hurricane and buried under mud, and begins to attack Nagoya.The editor of Sakai's newspaper believes that the military cannot do anything against Godzilla and discusses it with Sakai and Junko. Jiro, another reporter who loves to eat eggs, walks in and suggests that Mothra might be able to defeat Godzilla. Sakai and Junko are skeptical that the Shobijin would agree because atomic testing had destroyed most of their island, and they had failed to return the egg to them.
The two go to Infant Island anyway with Professor Miura. They are captured by the local villagers and are brought to the tribe’s chief. The three ask for assistance but, as expected, are refused because of the atomic testing and Japan's failure to return the egg.
The Shobijin are heard singing and everyone walks towards them. Sakai, Junko, and Miura ask the Shobijin for Mothra's assistance but they are also turned down. Junko then pleads to all the villagers that not everyone from Japan should be accused for what happened to their island. Godzilla is killing everyone and refusing their country assistance is wrong. Sakai then adds that "we're all human" and that everyone is connected and must help each other. Mothra's screech is soon heard and the Shobijin ask everyone to follow them. They convince Mothra to help Japan and the people that live in it, but the monstrous insect is old and weak. Even if Mothra defeats Godzilla, she will die.
The next day, Kumayama barges into Torahata's room and demands Torahata give him his money back that Torahata had recently swindled from Kumayama. They fight and eventually, Torahata is defeated by being punched in the mouth, and is bleeding. Kumayama crawls into Torahata's money cabinet and begins to steal the money from it. Torahata wakes up and sees Godzilla approaching the hotel. He then grabs a gun and shoots Kumayama in the head, killing him. Torahata is killed while escaping with his money when Godzilla destroys the hotel.
Godzilla walks towards the egg and tries to destroy it until Mothra shows up. The two fight a tough battle where Mothra seems to have the upper hand. While on the ground, Godzilla fires his atomic breath into Mothra's face and mortally injures her. Mothra dies with her wing resting on top of her egg while Godzilla walks away. The Shobijin then explain to Sakai, Junko, and Miura that the egg can be hatched today and begin to sing.
Meanwhile, the military tries to fight Godzilla by electrocuting him with "artificial lighting" but failed. Godzilla then melts the tanks with his atomic breath. The Shobijin continue singing and Mothra's egg finally hatches with not one, but two Mothra larvae. The larvae follow Godzilla to Iwa Island and use their silk spray on Godzilla to trap him, sending him into the sea. The Mothra larvae and the Shobijin celebrate and return to Infant Island.PLOT/ Ghidorgoji
Police Detective Shindo (Yosuke Nakutsi) is assigned to guard Princess Selina Salno of Selgina AkikoWakabayashi) during the Princess' visit to Japan, due to a suspected assassination plot. Although Shindo is smitten with Selina's photograph, her plane never makes it to Japan, as it is destroyed by a bomb en route. At exactly the same time a meteorite shower draws the attention of Professor Murai (Hiroshi Koizumi), who along with his team of scientists strikes out into the wilderness to examine the largest of the meteors, which has magnetic properties.
To Shindo's surprise, the supposedly deceased Selina turns up in Japan, without her royal garb (including the golden bracelet which proves she is heir to the throne of Selgina), claiming to be from the planet Mars, and preaching to skeptical crowds of forthcoming disaster. To their surprise however, her prophecies begin coming true. First she predicts Rodan, thought dead in the eruption of Mt.Aso , will emerge from Aso's crater. Subsequently, none other than Godzilla will arise from the sea and destroy a ship. Both of these events transpire.
In the meantime, Selina's uncle (Shin Otomo), who was behind the assassination attempt, learns of her survival and sends his best assassin Malness (Hisaya Ito) to Japan to dispatch the Princess and steal the golden bracelet. Malness and his henchmen are stopped by Shindo, who was warned of their attempt by the Shobijin (Emi and Yumi Ito), who were in Japan appearing on a television show. The Shobijin had been scheduled to return to Infant Island aboard the ship sunk by Godzilla, but opted not to go after overhearing Selina's prophecy. A further attempt by the assassins is thwarted when both Godzilla and Rodan attack the city and engage in battle, forcing everyone to flee.
Convinced that Selina is insane, Shindo takes the Princess to see a renowned psychiatrist, Dr. Tsukamoto (Takashi Emura), in the hopes of curing her. However, Tsukamoto can find nothing wrong with her, mentally or physically. He concludes she must therefore truly be possessed by a Martian as she claims. As if emboldened by the doctor's diagnosis, Selina reveals her final prophecy—that Mars' once thriving civilization was destroyed by an evil, golden three-headed dragon named King Ghidorah , and furthermore that Ghidorah himself has already arrived on Earth. No sooner has she revealed this than Professor Murai and his colleagues at the meteor crash site receive a nasty surprise—the "meteor" is actually an egg, which hatches into the fearsome King Ghidorah. Ghidorah begins razing the countryside.
To combat the combined threats of the three monsters, the Japanese government enlists the aide of the Shobijin to summon Mothra. Upon arriving on the Japanese mainland, Mothra attempts to persuade the quarreling Godzilla and Rodan to team up against the evil alien (which is translated to the humans by the Shobijin) but both refuse, with Godzilla stating they have no reason to save mankind as both he and Rodan "have always had trouble with men and men hate them" which Rodan agrees to. Despite Mothra stating that Earth belongs to them as well and that it is their duty to defend it, Godzilla and Rodan still refuse (with Godzilla apparently swearing at Mothra) and the pair refuse to forgive each other, wanting to continue their fight. Unable to convince them and despite being vastly overpowered, Mothra calls the pair of them "bullheaded" and resolves to fight Ghidorah by herself. Mothra engages Ghidorah and is continually blasted by his gravity beams. Luckily for Mothra, Godzilla and Rodan; impressed by her courage and selflessness; arrive to help and a titanic battle against Ghidorah begins. Meanwhile, Shindo and Dr. Tsukamoto are forced to protect Princess Selina as Malness and his men converge on Tsukamoto's clinic; they fend the killers off and escape into the mountains as the dueling monsters draw closer, so they can watch the battle from a safe distance.
The assassins attempt to follow, but a stray blast from Ghidorah buries their car in an avalanche. Only Malness remains uninjured enough to continue. He attempts to snipe the Princess from an elevated position, but only injures her. In her pain, she regains her memory and is no longer possessed by the Martian. Before Malness can take another shot, another stray blast from Ghidorah buries the assassin under a second avalanche. With the heroes thus saved from the human menace, they gather at a safe distance to watch the battle between earth's monsters and Ghidorah. After not gaining a clear advantage over Ghidorah, the three monsters coordinate their attack; Godzilla grabs hold of Ghidorah's tails while Mothra (riding on Rodan's back) sprays the three-headed dragon with her silk. Finally, Godzilla throws the alien beast off the cliff and the battered dragon flies off, back into outer space.
As Mothra and the Shobijin return to Infant Island while Godzilla and Rodan go their separate ways. Selina, having retained the memories of her time with Shindo, bids farewell to her guardian as she meets her bodyguards at the airport to return home.