Is Taiyou no Kiba Dougram hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

TV · 1981 · 75 episodes · PG-13 - Teens 13 or older
Drama, Mecha, Military, Sci-Fi
The story is centered around a small group of guerilla freedom fighters on a colonial planet named Deployer, who are known as the "Deployer 7", or "Sun Fang" team. In an unexpected coup, the elected Governor of Deployer becomes dictator and rules Deployer under martial law with the support of Earth's Federation. Fighting for independence from Earth's Federation influence, the freedom fighters begin a rebellion against the Federation's Combat Armors using a Combat Armor of their own: the Dougram. (Source: AniDB)
View on MyAnimeListShare
Check another title