1958

In the real world

 * The Large Antarctic Sea Mammal is spotted on February 13 at 7:00 PM near the Lutzow-Holm Bay in Antarctica by the Japanese research vessel Soya. The cryptid is described as looking like Godzilla.
 * The H-Man is released on June 24 in Japan.
 * Varan is released on October 14 in Japan.

In the Daikaiju universe

 * A monster dubbed Varan is discovered and attacks Japan, but is slain. (Varan the Unbelievable)
 * A rogue planet named Planet R hurtles towards Earth. A team of Pairans depart their planet for Earth on a desperate quest to warn the humans of their impending doom. (Warning from Space)
 * The shape-shifting organism called the H-man arrives in Japan and kills many people, but is eventually destroyed by fire. (The H-Man)