The Godzilla franchise began in the year 1954, and as of 2025, is on-going, it has collided with the King Kong franchise a few times, only once in Japan, but has collided with the King Kong franchise in the 21st century during the American films.
Japanese
Showa era (1954-1975)
Heisei era (1984-1995)
Millennium era (1999-2004)
Reiwa era (2016-present)
American
Tristar Pictures (1998-2001)
Legendary Pictures (2014-present)