Yomiyama Police Department

The Yomiyama Police Department is the municipal law-enforcement organization responsible for investigating the deaths and violent incidents surrounding Yomiyama North Middle School. Its significance lies in the tension between ordinary police procedure and the increasingly connected pattern of deaths associated with the class: the department can classify individual incidents, collect testimony, and establish causes of death, yet its investigators remain troubled by the possibility that accidents, illness, suicide, and murder form a larger sequence.

Investigative Presence and Detective Oba

The department enters the narrative through Detective Oba, a middle-aged, round-faced investigator whom Koichi Sakakibara recognizes from the Yomiyama Police Department. Oba had previously questioned Koichi in the teachers’ office with another detective after Sanae Mizuno’s accident. He later approaches Koichi at the school gate, initially presenting the encounter as an informal recognition of a familiar face before confirming that he is investigating what happened to Mr. Kubodera.

Oba’s manner combines professional caution with personal unease. He tells Koichi that the department is treating Mr. Kubodera’s classroom death as a suicide because the circumstances leave little room for suspicion, while identifying the motive as the unresolved issue. The police therefore establish a conventional legal interpretation without claiming that the circumstances are psychologically or narratively settled. Oba’s questioning also shows that the department’s attention is not limited to a single death: he refers to Sanae Mizuno’s accidental death, Yukari Sakuragi’s accidental death, and the death of Yukari’s mother in a car accident on the same day.

A Pattern Beyond Individual Cases

Oba states that the investigations found no sign of foul play in the accidents and no explanation other than pure accident, giving the department no formal reason to continue pursuing them. Nevertheless, he admits that the cases continue to trouble him. He has also heard of another boy, Takabayashi, who died of an illness, and observes that many people connected to the same middle-school class have died within a very short period.

This distinction between proof and suspicion defines the department’s position. The police can document separate causes and decline to treat them as criminally connected, but Oba’s private rounds of questioning acknowledge that statistical concentration and recurring association create a problem ordinary case-by-case reasoning does not resolve. His stated motive is personal interest rather than an announced official theory, suggesting an investigator working at the boundary between routine duty and an intuition that the available categories are inadequate.

Evidence, Witnesses, and Crisis Response

The department relies on witness testimony from people who directly experience the incidents. Oba confirms that Koichi witnessed Mr. Kubodera’s death in the classroom, making Koichi both a student caught inside the disaster and a potential source of evidence. Later, Detective Oba visits Koichi after the Sakitani Memorial Hall fire and provides the details of that incident. The department’s role consequently extends beyond immediate investigation: it becomes the institution through which survivors learn the official reconstruction of what occurred.

The contrast between police procedure and the violence itself is stark. Mr. Kubodera withdraws a sharp-bladed knife from a bag on his desk before the classroom suicide, while the Sakitani Memorial Hall deaths involve a deliberately organized sequence of stabbing, burning, and attempted suicide. These scenes require the department to move from investigating an apparent self-inflicted death to reconstructing a mass killing in which fire initially threatens to obscure the causes of death.

Findings from the Sakitani Memorial Hall Massacre

The department’s coroner’s inquest and court-ordered autopsies establish that none of the six victims died from the fire. Kensaku Numata, the caretaker, was stabbed in the neck with numerous metal cooking skewers and was burned afterward. Four students—Manabu Maejima, Yonemura, Sugiura, and Nakao—died from blood loss after being stabbed and cut repeatedly with a sharp blade. Izumi Akazawa died from the breaking of her spine after falling from a second-floor balcony.

The investigation, combined with circumstances at the scene and witness testimony, concludes that Mieko Numata, the wife of Kensaku Numata and his partner in managing the Sakitani Memorial Hall, caused the deaths of all six victims. The police reconstruction holds that she scattered kerosene around the kitchen and set the fire after killing Kensaku Numata. Tatsuji Chibiki restrained her, but before she could be surrendered to the police, she died by biting through her tongue. The department can therefore establish the mechanics and responsibility of the massacre while leaving its deepest motive unresolved.

Institutional Limits and Narrative Function

The Yomiyama Police Department represents the explanatory power and limits of secular investigation. It is capable of identifying wounds, distinguishing fire deaths from deaths that occurred before the fire, evaluating witness accounts, and assigning responsibility. Yet the department does not discover or authenticate the supernatural structure behind the class’s disasters. The possibility of an “extra person” remains outside the police framework, while the students’ attempts to identify that person depend on Mei Misaki’s doll’s eye and the group’s interpretation of circumstantial signs rather than official police evidence.

The department’s investigations also provide a counterpoint to the students’ increasingly desperate reasoning. Naoya Teshigawara mistakes Tomohiko Kazami’s missing childhood memories for proof that Kazami is the extra person, whereas Koichi recognizes that such memory gaps cannot identify someone who has returned from death without knowing that he has died. Against this unstable student speculation, the police offer material findings; against the supernatural pattern, those findings remain incomplete. The Yomiyama Police Department thus anchors the story in documented reality even as its cases expose the inadequacy of documentation alone.