Altered Carbon: Resleeved

Altered Carbon: Resleeved and 91 Days have very different stories about criminal syndicates, but feature the most realistic interpretation of organized crime in anime. 91 Days portray the American Italian mafia during the Prohibition era whereas Altered Carbon portray the yakuza in a futuristic era. 91 Days is probably the best gangster anime. Altered Carbon is one of the fewest crime themed anime focused on the yakuza. You definitely watch these titles if you are looking for more gangster anime.  

Are you interested in action anime involving organized crime? Altered Carbon: Resleeved is one of the very rare anime involving the yakuza in a crime themed storyline. For this distinction, you should consider watching Altered Carbon. If you have a distaste for CGI anime then you should not watch Altered Carbon. Since Japan has been disinclined to make anime involving the yakuza in a crime themed storyline, you often have settle for series involving fictionalized organized crime groups. Gangsta. is one of the better crime themed anime even though its society is completely fictional. 

Altered Carbon: Resleeved and Black Lagoon are very different action anime, but have storyline involving organized crime. Black Lagoon is widely recognized as one of the most popular anime in this space. Altered Carbon is one of the very rare anime involving the yakuza with a crime themed storyline. If you are hunting down anime involving organized crime then you need to catch both of these anime.  

Altered Carbon: Resleeved and Gungrave have very different stories, but are focused on the drama between the main character and a criminal syndicate. Gungrave created a fictionalized criminal syndicate whereas Altered Carbon features the yakuza. Unlike live action gangster movies, your choices of gangster anime is more limited and what is available is very stylized. That being said, you should consider watching this anime if you are looking for more anime involving criminal syndicates.