So... is Garouden: The Way of the Lone Wolf finished or not?
NO, it is not finished.
Why?
MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
Watching Order (by release date)
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Synopsis
Juuzou, haunted by his past, finds himself unwillingly drawn into a brutal, clandestine fighting tournament.
He possesses mastery of the Takemiya-ryuu martial art, a skill he'll need to survive the dangerous opponents he'll face.
Adding to his troubles, Juuzou is a wanted man with a significant bounty on his head, pursued by a relentless detective.
He must confront both his inner demons and external threats as he fights for survival in this perilous competition.