Is Hokuto no Ken Movie hentai?
English title: Fist of the North Star: The Movie
No
Rated R (17+ (violence & profanity)) on MyAnimeList and not tagged as Hentai.

Movie · 1986 · 1 episodes · R - 17+ (violence & profanity)
Action, Drama, Gore, Martial Arts, Sci-Fi, Shounen, Super Power
Following a cataclysmic nuclear war, the world teeters on the brink of complete destruction. Civilization is polarized into a degenerate society where opposing packs of marauding scavengers prey on helpless, homeless nomads. For those who are lucky enough to survive the constant brutality and danger, it is a bleak existence. Life an death blur into abstractions. The only hope left for mankind is to find a hero worthy of becoming the next "Fist of the North Star" - an enlightened warrior - who is capable of leading those with the will to survive out of this barrenness into a new world. But in this savage no-man's land of shifting loyalties and power-hungry demi-gods, heroes are in short supply. (Source: AniDB)
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