Is Uchuu Kaizoku Captain Herlock: Arcadia-gou no Nazo hentai?
English title: Space Pirate Captain Harlock: Riddle of the Arcadia Episode
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

Movie · 1978 · 1 episodes · PG-13 - Teens 13 or older
Action, Adventure, Drama, Sci-Fi, Space
The story on Arcadia's mystery, on which the 13th television episode was based.
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