Ishii Hisaichi no Nanda Kanda Gekijou
Japanese title: いしいひさいちのナンダカンダ劇場
Alternative titles: The Fabled Underground People, Kore ga Uwasa no Chiteijin Tonikaku Ue ga Waruin'ya!!, Chiteijin II Christmas wa Eedo
Type: OVA
Source: Unknown
Episodes: 2
Status: Finished Airing
Aired: Jul 25, 1989 to Nov 25, 1989
Duration: 31 min per ep
Rating: PG - Children
Genres: Comedy, Sci-Fi
Themes: Martial Arts, Space

The Underground People desire to leave their overcrowded cavern and seize control of the surface world, but they never quite succeed. A second episode, Christmas Aid, soon followed, in which the brainless Undergrounders' second futile escape attempt is set to music by the popular group Yukadan. The first volume also included two unrelated stories by Ishii: 101 Ninja and Ken-chan's Space Exploration Adventure.

(Source: The Anime Encyclopedia)