The Kaijū Collection

Kaijū eiga (often shortened to kaijū in the West) is a Japanese term for what are essentially giant monster movies. More often than not it’s an actor in a rubber suit laying waste to amazingly detailed scale model towns, but the best have an important subtext that explores deeper concerns.
The most famous is Toho’s Gojira/Godzilla, affectionately called King of the Monsters, but there’s more than just Godzilla in the pantheon, so if you're interested in the merits of the genre, don't stop there:

Genre films:
01. Godzilla (1954—)
02. Rodan (1956—)
03. Mothra ((1961—)
04. Gamera (1965—)
05. Daimajin I, Daimajin II, Daimajin III (1966)
06. The X from Outer Space (1967)
07. King Kong Escapes (1967)
08. Daigoro vs. Goliath (1971)
09. The Last Dinosaur (1977)
10. Attack of the Super Monsters (1982)

Influenced by:
01. The Host (2006)
02. Cloverfield (2008)
03. Pacific Rim (2013)

See also:
01. Daimajin Kanon (2010) TV Series on our sister site, Nut Box.
02. Godzilla comics on our sister site, Nut Ink.