Is Gamba no Bouken hentai?
English title: Adventure of Gamba
No
Rated G (All Ages) on MyAnimeList and not tagged as Hentai.

TV · 1975 · 26 episodes · G - All Ages
Adventure, Anthropomorphic, Kids, Suspense
An adventurous wild mouse called Gamba travels with his friends to see the ocean but he finds an injured mouse and hears about the violence of white ferret Noroi. Gamba decides to help the mice suffering under Noroi's tyranny.
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