[4][5][6] National Kid is a messenger from the Andromeda Galaxy thirty thousand light-years away, who is immortal and protects the Earth from invaders.

The story has National Kid defending the Earth from the Incas, an alien race who arrive from the planet Venus.

Concerned that the effects of nuclear tests on Earth could spread through space, the Incas invade and unleash massive UFO attacks on Japan.

The hero flies into the mountains and uses his Eroruya Ray Gun to blow apart some boulders in order to uncover some rare minerals that helped in creating a remedy for the virus' effects.

Already using new techniques including blue screen, the special effects are significantly improved over the first story's efforts.

This time National Kid battles an army of oceanic creatures called the Undersea People Coelacanth (海底人シーラカンス, Kaiteijin Shīrakansu).

The Undersea People- ancient coelacanth fish that had evolved into human beings- declare war on the surface world.

Then Taro's father mistakenly threatens the destruction of Tokyo and unleashes the giant monster Gyabura for his boy's blunder.

After this final threat, Ryusaku Hata reveals he is the Earth's hero National Kid and returns to Andromeda.

The cast members of National Kid were:[7] For the Brazilian version, voices were dubbed in Portuguese by:[7] To compete against KRTV's Moonlight Mask (1958), NET (now TV Asahi) commissioned the production of their own tokusatsu series from Toei Company.

[2] Sponsored by Matsushita Electric in order to promote their National brand electronics, it was considered a "relatively expensive series" by The Dorama Encyclopedia's authors.

Nagayoshi Akasaka, director of the series, was inspired by Adventures of Superman when creating National Kid.

[2] Toei described it as a "big hit" and as having "strong popularity" even in 2015, and released a digital remastered version of the show on May 13, 2015.

[11] The work comicalized the first three seasons of National Kid until its June 1961 issue, when it started to create original plots.

[4] A series of graffiti with the phrase "Celacanto provoca maremoto" ("The coelacanth causes seaquake"), referencing the villains' submarine, appeared in several spots of Rio de Janeiro as meme, starting from 1977 in Zona Sul and throughout the city in the early 1980s.

[16] In 2018, the Olinda carnival will feature the superhero as a mediator for Donald Trump and Kim Jong Un trying to solve the 2017–18 North Korea crisis.