Is Kikou Souseiki Mospeada hentai?
English title: Genesis Climber Mospeada
No
Rated R+ (Mild Nudity) on MyAnimeList and not tagged as Hentai.

TV · 1983 · 25 episodes · R+ - Mild Nudity
Mecha, Military
Without warning in the year 2050, an alien race known only as the Inbit arrive, invade and successfully conquer the Earth. Years later and despite brutal past failures, the inhabitants of Mars Colony send out yet another desperate Liberation Force to try and reclaim their lost home world. The fleet is all but destroyed. However, a lone survivor, Stig Bernard, finds himself on Earth. Gathering a mere handful of resistance fighters, Stig journeys on towards the Inbit's headquarters at Reflex Point in an attempt to gather intelligence and, possibly, discover a way to beat them. (Source: ANN)
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