During the 1950s, Japanese film studio Toho produce their first successful Kaiju films. Their first successful Kaiju film was "Godzilla" (1954), which adapted the nuclear concept from "The Beast from 20,000 Fathoms" from a Japanese perspective, rooted in real-life Japanese historical events, such as the atomic bombings of Hiroshima and Nagasaki in 1945 and the Daigo Fukuryū Maru incident in 1954. The film's success spawned the "Godzilla" franchise, the longest-running film franchise in history. The titular monster has become a cultural icon, and one of the most recognizable monsters in cinema history. It also inspired a wave of Kaiju films, such as "Rodan" from this time.