In the real world
- The films Atragon and Matango are released to Japanese theaters.
- Eiji Tsuburaya founds his own company, Tsuburaya Productions, so that he can work on side projects in addition to working with Toho.
In the Kaiju Multiverse
- The ancient civilization of Mu prepares to attack the modern world, along with their sea dragon Manda. However, the advanced submarine, the Gotengo, intervenes and saves humanity. (Atragon)
- A ship becomes stranded on an island off the coast of Japan populated by "mushroom people" called Matango. Only a single survivor is recovered and brought back to Japan, where he tells the story of what happened to the others. It is eventually discovered that he too is slowly being assimilated by the Matango. (Matango)
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