Godzilla Raids Again , Gojira no Gyakush? , lit. Counterattack of Godzilla , is a 1955 Japanese Science fiction Kaiju film directed by Motoyoshi Oda. It is the second film in the Godzilla franchise and the second film in the Showa series. The film is a direct sequel to the 1954 film, Godzilla, that was quickly put into production to capitalize on the films box office success. This was the first film in the franchise to feature a monster vs. monster scenario, as it introduced Godzillas first foe, Anguirus. This scenario of Godzilla battling other giant monsters would become a staple for the rest of the franchise and genre.
Two pilots named Shoichi Tsukioka and Koji Kobayashi are hunting for schools of fish for a tuna cannery company in Osaka. Kobayashis plane malfunctions and is forced to land near Iwato Island, an uninhabited strip of rocks formed by volcanic eruptions. Tsukioka then looks for Kobayashi and finds him safe, with only a wrist sprain. While talking, the two men hear some strange sounds and find two monsters fighting. Tsukioka immediately recognizes one of the monsters to be Godzilla. The two monsters then fall off a cliff, into the ocean.Tsukioka and Kobayashi report to the authorities in Osaka, and find out that the other monster Godzilla was fighting is Anguirus. A group of scientists with the two pilots research Anguirus in a book written by a Polish scientist. Godzilla and Anguirus lived around the same time millions of years ago, and there was an intense rivalry between the two monsters. ........
Source: Wikipedia