Akio Kawasaki

Akio Kawasaki is a missing man whose disappearance revives a dormant investigation into Gen Sekine and ultimately gives the police physical evidence in the case against him. A waste-management company president, Kawasaki had a disagreement with a dog breeder; when that detail surfaced after he failed to come home, the police recognized the danger his connection to Sekine might signal.

Identity and Background

Kawasaki is identified in the investigation as the president of a waste-management company. The account gives little about his life beyond his work and his marriage: his wife is the person who reports him missing after he does not return home. His importance to the narrative emerges through his disappearance and the investigation it sets in motion.

Disappearance and the Cold Case

After several days without Kawasaki, his wife went to the police. Officers initially asked routine questions about possible problems at home, unusual behavior, enemies, or previous absences. Her answers gave them no obvious explanation. Then she mentioned that Kawasaki had disagreed with a dog breeder. The officer in charge immediately became grave and warned her to prepare for the worst if her husband had been involved with Sekine. Shaken, she returned home while the police reopened an old case whose earlier leads had gone cold.

Two months after Kawasaki vanished, he was still missing. The Saitama Prefectural Police homicide division established a special task force, and ten detectives were working on the case by the time a source brought the investigation to the Yomiuri Shinbun. The source said there was no need to rush publication: the police leadership itself did not yet know the details, making a leak to competing newspapers unlikely. Kawasaki’s absence had thus become the center of a tightly guarded inquiry, though the early investigative route was through a comparatively minor fraud charge rather than a homicide warrant.

Evidence and Resolution

The investigation’s understanding of the disappearances changed when Ryoji Arai disclosed that Shima, his driver, had been involved in the disappearance of the last four victims. Arai had learned from Shima that Sekine killed Yasunobu Endo and his driver, Wakui, with poison, and that Shima helped bury them. Shima’s knowledge offered the police a route to evidence against Sekine and, ultimately, to Kawasaki.

After Shima was arrested in December and confronted with the existence of recordings, he provided information that led police to a site in Gunma Prefecture. There they found enough of Kawasaki’s teeth to support the case. On January 5, after the New Year’s holidays, the police announced the arrests of Sekine and his wife for Kawasaki’s dismemberment. Sekine admitted almost everything within hours of his arrest, and the Saitama Dog Lover Serial Disappearances case was declared closed.

Narrative Significance

Kawasaki is presented principally through other people’s actions: his wife’s report, the police officer’s sudden warning, the investigators’ renewed attention, and Shima’s information about the burial site. That limited perspective makes the disappearance itself the hinge of the episode. A single detail about a disagreement with a dog breeder turns an apparently ordinary missing-person report into the trigger for reopening a cold case; the recovered teeth then transform a disappearance into evidence capable of bringing the investigation to a close.