Shin Godzilla

Godzilla overheats after expending massive energy during its bipedal form's attack on Tokyo. Its internal nuclear fission generates enormous heat, and when it can't dissipate that heat efficiently in its land-based form, it retreats to the ocean where the water provides cooling. This is the first indication of Godzilla's biological cooling system, which becomes crucial to the later deep-freeze strategy.

Earlier, when Godzilla first crawls through Tokyo in its amphibious form, it already shows signs of overheating and retreats to the water temporarily.

Goro Maki was a disgraced anti-nuclear zoologist who studied mutations caused by radioactive contamination. He theorized that high levels of radiation in the ocean would eventually trigger the evolution of a massive creature. Maki's research, which he encoded in cryptic notes before disappearing, directly predicted the emergence of Godzilla. Both American and Japanese scientific communities had dismissed his work, and the U.S. had actively suppressed his publication.

Godzilla's atomic breath is generated through nuclear fusion occurring in its body. The creature channels energy from its internal nuclear fission reactor through specialized organs in its mouth and dorsal plates, releasing it as a concentrated beam of radioactive energy. When wounded by the bunker-buster, Godzilla unleashes this breath as a devastating retaliatory attack, destroying military assets and incinerating large sections of Tokyo.

The deep-freeze plan exploits Godzilla's cooling system vulnerability. Yaguchi's team discovers that Godzilla's blood and dorsal plates function as a radiator, and they theorize that a coagulating agent could freeze the creature from inside out. The operation uses drones to provoke Godzilla into expending its atomic breath, unmanned trains loaded with explosives to damage its feet, and tankers to inject the coagulating agent directly into Godzilla's mouth. Once inside, the agent triggers rapid freezing that solidifies the creature.

The UN issues the nuclear threat because Godzilla has proven nearly invulnerable to conventional military forces. After the SDF fails and Godzilla devastates Tokyo with its atomic breath, the international community fears the creature will continue spreading destruction. With no proven method to stop it and Godzilla's apparent ability to absorb or survive attacks, the UN gives Japan a deadline to subdue Godzilla or face a thermonuclear strike that would cause catastrophic radioactive fallout across Japan.

The humanoid creatures emerging from Godzilla's tail are implications of its asexual reproductive capability. Earlier, Yaguchi's team analyzes tissue samples and concludes Godzilla can reproduce without a mate. These frozen figures suggest that Godzilla may reproduce by budding or releasing offspring from its body, potentially creating additional creatures. Their appearance sets up the sequel premise that Godzilla remains a persistent threat.

Godzilla's dorsal plates and blood vessels function as a biological cooling system, essentially acting like a radiator for the massive heat generated by its internal nuclear reactor. The plates increase surface area to dissipate heat, while specialized blood flow transports excess thermal energy away from its core. This biological mechanism is what allows Godzilla to survive its own nuclear fission process, and it's this same system that the deep-freeze plan targets.

The prime minister and top government officials are evacuated via helicopter as the U.S. launches a massive airstrike plan against Godzilla. However, the wounded Godzilla retaliates by firing its atomic breath, which destroys the helicopter carrying the prime minister and several officials. This catastrophic loss forces Japan into a leadership crisis at the worst possible moment and demonstrates the futility of the conventional military approach.

Yaguchi's team uses origami, the art of paper folding, to decode Maki's cryptic notes left on his abandoned yacht. Maki encoded his research using mathematical patterns and structural relationships that could only be deciphered by physically folding paper in specific ways. This origami-based cipher reveals the scientific foundation for understanding Godzilla's biology and becomes essential to developing the deep-freeze strategy.

Godzilla undergoes rapid evolutionary changes across multiple distinct forms. It begins as an aquatic creature in Tokyo Bay, then transitions to an amphibious form that crawls inland. Later, it evolves into a bipedal creature that attacks Tokyo, but overheats and returns to the sea. Finally, it appears in its fourth form, twice the original size, making landfall near Kamakura as the terrifying monster that devastates the military. Each evolution increases its size, strength, and destructive capability.

Kayoko Ann Patterson serves as the U.S. special envoy to Japan, but her position is politically complex. She reveals Maki's background and connects the U.S. suppression of his research. More crucially, she leverages her political connections to buy time for Yaguchi's team by convincing the U.S. and UN to delay the nuclear strike. Her actions are motivated by her desire to prevent Japan from suffering another nuclear catastrophe, having witnessed the historical weight of Hiroshima and Nagasaki.

After Godzilla is frozen, scientists determine that the radioactive isotope within its body has a half-life of only twenty days. This means the radiation contamination from the frozen creature will decay relatively quickly, allowing Tokyo to be rebuilt without permanent radioactive danger. The short half-life is a critical plot point that makes the deep-freeze solution viable long-term, as the city can eventually recover rather than remain a permanent nuclear wasteland.