Garouden: The Way of the Lone Wolf
Japanese title: 餓狼伝: The Way of the Lone Wolf
Type: ONA
Episodes: 8
Source: Novel
Genres: Action
Studios: NAZ
Duration: 24 min per ep
Rating: R - 17+ (violence & profanity)

On the run from his troubled past, Juuzou is forced into competing in a deadly underground fighting tournament. Skilled in the respected martial art Takemiya-ryuu, Juuzou must navigate a path filled with formidable foes and his personal demons — all while dealing with a bounty of three million yen on his head and a detective on his trail.

(Source: Netflix, edited)