Check out these amazing Gang themed Asian films - AsianFilmFans

CID officer Tong gets himself entangled with a gang of killers from mainland China, who are out killing criminals to rob them of their money, and using an ideological basis to justify the killings as protecting mainland China from the criminal scum of Hong Kong.

Tactical Unit - Human Nature (2008)

Fox Hunting adapted from Wang Jianxing's popular novel of the same name, the original work won the "Golden Shield Literature Award". It is about the kidnapping of the daughter of the chairman of a company based in a certain country abroad, and a huge ransom. The company's security captain and veteran Xiao Jian, in order to make up for his negligence, safeguard the dignity of the Chinese people, assist the country's police officer Mo Tai through hardships, wipe out the terrorists, and rescue the touching stories of his compatriots.

Fox Hunting (2020)

A powerful triad boss has been kidnapped, and the new police superintendent Koo decides to recruit the help of Mann, a former supercop who has since been relegated to back-up duty. Mann has his work cut out for him when he realizes his opponent is Sam, a former cop with plenty of grudges. When Sam takes the fight to Mann’s family, Mann is more than determined to bring down the dangerous kidnapper and his gang.

Black Ransom (2010)

Extreme sport lover Zhou Feng got involved in an international illegal trade by accident. So he had to follow an international special agent Bruce to Budapest. Together with a crappy police officer Miao Yan, a non-professional scientist Ding Shan and an unemployed doctor LV, they became an amateur unit. In company with the senior agent Bruce, these four rookies started a fight with the terrorists that was both thrilling and hilarious.

The Rookies (2019)

A Korean remake of the John Woo Classic. One brother is a criminal. One brother is a cop. Both will fight to the death.

A Better Tomorrow (2010)

Michelle Yip of the Hong Kong police is a mild-mannered Kung Fu expert; Michael Wong from air security is happy-go-lucky, stuck on himself, constantly talking, and smitten by her; Yamamoto is quiet, hard-boiled, leaving the Tokyo police to spend time with his wife and daughter. They form an alliance when they foil a hijacking on a plane flying a mob prisoner from Tokyo to Hong Kong. The mobster and his would-be rescuer die; this sets off two avengers who were their blood brothers. Our three cops become the targets. A high-speed chase, a car bomb, the destruction of a nightclub, a spectacular suicide, dead bystanders, and a flying coffin litter the landscape by the end.

Royal Warriors (1986)

An avenging aswang killer teams up with a hybrid and a team of demon hunters to attack the lair of the most powerful underworld warlords, only to find themselves in a twisted trap and a fight to the death.

Blood Hunters: Rise Of The Hybrids (2019)

After a traumatic event, a drug trafficker turns sides and conspires with a dangerously ambitious undercover police officer to bring down the mysterious kingpin of a major drug cartel. (Remake of the Chinese film “Drug War,” 2012.)

Believer (2018)

A detective tracks down a gang of criminals ten years after they initially evaded arrest.

Caught In Time (2020)

In this third sequel, Mainland cop and perennial straight-woman Cheng decides on a civilian life in Hong Kong, but her immigration quickly proves comical.

Her Fatal Ways 4 (1994)

Young-goo the son of mafia boss Don Carini, is too foolish to be part of the mafia elite. One day, Young-goo comes to his father and is trained by Tony V to be his father's successor. A few days later, Young-goo accidentally rescues Nancy, the only daughter of Don Bonfante, the boss of a rival mafia family. But Vinnie, an under-boss of the Bonfante family kidnapped her and fabricates that Young-goo has taken her. Vinnie's behavior provokes an armed conflict between the two families.

The Last Godfather (2010)

Raku Ichijo (Kento Nakajima) is an only son and a high school student. His father is the leader of yakuza group Shuei-gumi. Raku Ichijo doesn't like to fight and he studies hard. His dream is to become a public official. One day, he passes the entrance gate at his high school and is kicked inadvertently by Chitoge Kirisaki (Ayami Nakajo). She is a new transfer student at the school. Chitoge Kirisaki is the only daughter of a rival gang leader. To keep the peace between the rival gangs led by their fathers, Raku Ichijo and Chitoge Kirisaki decide to act as boyfriend and girlfriend. --asianwiki

Nisekoi: False Love (2018)