Rodan, released in Japan as Sora no Daikaij Radon ? , lit. Radon, Giant Monster of the Sky , is a 1956 Kaiju film produced by Toho Studios. It was the studios first Kaiju movie filmed in color though Tohos first color tokusatsu film, Madame White Snake, was released earlier that year. It is one of a series of giant monster movies that found an audience outside Japan, especially in the United States, where it was originally released as Rodan The Flying Monster
Two local miners and a policeman are stationed inside the mine, just before the waterline of the flooded shaft. Suddenly, they hear a splash in the flooded mine, and venture into the water to investigate. All three, however, are then attacked and slain by an unseen assailant. Soon after, the bodies of the three men are recovered and examined. The doctor announces that they, too, were killed by a sharp object that simply sliced them apart.Later that night, after a small incident with the widow of one of the slain, Shigeru and Kiyo are suddenly attacked by an unknown creature, resembling a gigantic insect larva, at Kiyos home. Kiyo and Shigeru manage to flee, and soon the police starts hunting the creature. It kills and drags off two officers before it escapes back into the mine. When the police and Shigeru reach the officers, they discover that their wounds match the wounds of the murdered. ........
Source: Wikipedia