A mysterious organism approximately 80 meters tall that suddenly appeared in Tokyo. Its purpose is unknown. It advances northward at a speed of about 32 km/h while destroying the city. It possesses skin so tough that it can withstand direct hits from naval gunfire, anti-ship missiles, and bunker busters. While its movement is slow, its reflexes are excellent. Its roar is an act of intimidation that vibrates the atmosphere and shakes the earth. Its primary weapons are its sturdy tail, sharp claws, and fangs. The power of its tail-swinging attack is particularly devastating. Its weak point is the inside of its mouth. It is capable of firing a super-high-temperature destructive heat ray of approximately 3,200 degrees Celsius from its mouth. However, a short charging time is required to fire the ray. During charging, its eyes and blood vessels glow with an eerie pale blue light as all energy is concentrated in its mouth before being unleashed. It cannot speak human language and only emits cries such as "Grrr..." or "Grrr-wooooooaaaaahhh!!" It possesses extraordinary regenerative and evolutionary capabilities.