Minoura/Synopsis

Armed Detective Agency vs. Port Mafia Arc
Minoura is found at the investigation scene with Sugimoto by Ranpo and Atsushi. He gives them both the information regarding Yamagiwa's death and says that the police don't need to hand over the investigation to amateurs like the detective agency.

He continues to show disbelief in Ranpo's ability to solve the case and calls his methods ridiculous. He eventually tells Ranpo to show he can solve the case with his ability. After Ranpo reveals Sugimoto as the culprit he initially laughs at the claim until Sugimoto reveals that he really did kill Yamagawa by pulling his gun on Ranpo.

He arrests and interrogates Sugimoto at the police station for details on the crime. After Sugimoto confesses to what happened Minoura confronts Ranpo and apologizes for how he doubted him earlier and thanks to him for his help with the case.

Minoura reappears to deliver documents requested by Kenji regarding the car bomb in the city. While delivering the information he notices Kyōka at the agency and says that she looks similar to a young girl who is on the police wanted list for being a ruthless killer. He starts questioning her about her parents and identification papers. Eventually, Fukuzawa butts in and claims that she is his granddaughter which Minoura believes saying they're "cut from the same cloth". He apologizes and quickly leaves the Agency.

The Guild Arc
Minoura and his subordinate is seen going around town in a police car. While his subordinate remarks how it is a peaceful day, Minoura disagrees and suspects how an explosion would seem to happen per his intuition. True enough, an explosion occurs along the road, and a man with bleeding eyes suddenly appears on their car window. As Minoura attempts to restrain the man, his partner points him to the riotous road up ahead.

Decay of Angels Arc
Minoura and his companion arrive at the scene where a crime scene happened - a body fell. Ranpo excitedly rushes to Minoura, which Poe tries to deduce the reason behind it. Ranpo proceeds to tell him that the criminal has notified the police before the man fell off, indicating that it was not suicide. Moreover, Ranpo and Poe check the victim's shoe and deduce together that the victim is not the Cleaner, but he was rather killed by the Cleaner to camouflage himself.

Later, while Ranpo is having a difficult time solving the case, Minoura approaches Poe and what he's doing. Minoura was then asked about the case and tells his companion about the Kindaichi case, in which a mystery author known as Kindaichi was killed in an inn in a manner resembling the novel he was writing prior his death.

After Ranpo deduces the culprit behind the crime scene, he arrives in Ranpo's aid to arrest the criminal however fails to do so since the culprit is inside a car that has diplomatic plates on it. Hence, they have no right to confine him there. Minoura and the others then let go of the culprit. Ranpo soon confronts Mushitaro who eventually surrenders to the police. Minoura is contacted about the evidence surfacing that prove Doppo Kunikida's innocence. Later, when Minoura is about to smoke, he finds his lighter missing, not knowing that Ranpo swiped it from him to burn the manuscript.

After the agency was framed by the Decay of Angels, appearing them as the terrorists, he sees Ranpo on the screen delivering a message to the police asking them to think with their souls: to think how many baffling cases he has helped them solve that no one else could solve for twelve years, even helping countless officers currently cornering him in the assembly hall. With such a case, he urges them to think how he can ever make such a simple mistake of getting caught if he indeed is a great detective guilty of terrorism. As he gets arrested, Ranpo issues a final testimony that being a detective is easy if seen with one's own eyes. Inspired with Ranpo's words, Minoura heads out of his office.

Minoura then helps Ranpo escape from the police car and tells him he has come to save him because he believes in his soul just like what the great detective implored the police to do through his earlier broadcast. They are soon cornered by the military police, which Ranpo thinks is quite impossible to escape. Minoura assures him that not all police are idiots like he thinks, upon which a half of the military police break the encirclement to protect the detective from arrest, believing in their intuition.

As the military police get divided amongst one another, Ranpo casually walks away from the scene and rides Minoura's car. Though the police officer chides how the detective has split the police forces into two, Ranpo says it is intentional in order to oppose the page's restrictions and to convince a certain individual. Minoura then lauds Ranpo being able to predict how some of the police would get moved by his words, but Ranpo admits that he has had his doubts and is initially hesitant whether he would really be able to sway the police according to his plan.