martial arts movie where the main character starts a prison riot

A martial arts instructor working at a police academy gets imprisoned after killing a man by accident. But when a vicious killer starts targeting martial arts masters, the instructor offers to help the police in return for his freedom.

A man dubbed "Karate Kid" is imprisoned and forced to fight for his life in an underground fighting ring.

A man is framed for murder and sent to prison. He is beaten and tortured, then forced to fight the prison's worst killer, a martial-arts fighting midget called Thud.

A film about a detective who participates with the fight club in the prison after chasing a criminal who killed his fiance.

Chen Hui-Man breaks out of jail and goes on the rampage for those who wrongly put him behind bars.

Kiba is back again, but this time he has fallen from grace and sent to prison for all the violent acts he has committed. Once he's out, he begins working as a bodyguard in a club that is crawling with gangsters.

A martial arts-trained lawyer is forced to fight in illicit matches after he is framed for a crime, is dismissed from his firm, and all his assets are tied up, including his clothing and furniture after he is evicted from his apartment.

Chained together in a ring of mistrust and hate, the good and the bad fight in karate.