Jingi no Harawata (2016)

The Kanto Mutsumo-kai, one of Japan's foremost gangster organisations, is under the dictatorship of Sugo, the third president of the Ryujin clan, and Saito, its president. Toraji (Ozawa Kazuyoshi), who rebelled against this dictatorship but was unsuccessfully insulated and expelled, is picked up by his uncle Ryuzo and joins the Takematsu Rengokai. Toraji recruits a group of local delinquents headed by Hiroshi Maeda (Yasukaze Motomiya) into his ranks and begins a guerrilla war against the Kanto Rikukai-affiliated Yoshinin-kai. The two expand their power, but Toraji begins to dabble in stimulants and gradually goes berserk. An assassination plot is hatched against Toraji, and Hiroshi tries to stop it.

Unfortunately the movie Jingi no Harawata is not yet available on HBO Max.