Police

The police (警察, Kei-satsu) are a body of individuals authorized by the government to enforce the law in the world. Chief Kuma states that the police "watch the traffic, take custody of juvenile delinquents, and preserve public safety and order."

History
The police were responsible for dealing with monsters alongside the Special forces before the formation of the Hero Association.

At some point in the past, the police arrested a human for drug possession who then monsterized to become Surprise-Attack Plum.

During the week prior to the events of Pork Cutlet Bowl, a subordinate of Chief Kuma was killed by Surprise-Attack Plum but was able to describe the appearance of the monster before his death.

Pork Cutlet Bowl
The Z-City Police Department brings Saitama in for interrogation due to his suspicious behavior and suspected relation to recent incidents in their precinct. Chief Kuma conducts the interrogation and offers Saitama a pork cutlet bowl. Saitama states that he is a hero, prompting Kuma to explain the conflict between the police and the Hero Association.

While Saitama is talking with Kuma, Surprise-Attack Plum attacks the police station. The officers are unable to subdue the monster. Chief Kuma sees the hopelessness of the situation and phones McCoy of the Hero Association to request assistance. Before Kuma can finish his plea, Saitama snatches the phone from his hand, saying that neither heroes nor police do their jobs because someone begs them to. He then declares he will defeat the monster to repay the police for the pork cutlet bowl.

Moments later, heroes and spectators gathered outside the Z-City Police Department station observe as Saitama, now dressed in a police uniform, carries Surprise-Attack Plum out of the building, giving the spectators the impression that the police were able to defeat the monster.