Yamamoto

Yamamoto is a senior reporter and newsroom leader at the Yomiuri Shinbun whose decisions help shape Jake Adelstein’s coverage of both the Saitama Dog Lover Serial Disappearances and Lucie Blackman’s disappearance. He is neither a remote editor nor simply a source of assignments: he works alongside reporters, assesses the danger and value of a story, and then gives it a structure that turns scattered information into a sustained investigation.

Position and Working Style

Yamamoto had risen to a position of authority in the office and was effectively running it, with Nakajima ranked second. The contrast between their work styles emerges through the newsroom’s joking labels for Nakajima and Adelstein, “the Cobra and the Mongoose”: the nickname for Nakajima reflected his precise, orderly manner, while Adelstein was characterized as more restless and disorganized. Yamamoto’s authority sits behind this office dynamic, but the evidence also places him in the work itself, sharing late hours and taking part in the practical decisions that determine what the paper pursues.

His manner combines caution with forward motion. When he introduces the dog-disappearance investigation to Adelstein and another colleague, he first warns Adelstein to keep the information confidential. The instruction frames the case as sensitive before its scale is fully understood. Yamamoto does not treat secrecy as a reason to drop the story; rather, it is part of the discipline required to investigate it.

Directing the Saitama Investigation

The investigation reaches the newsroom during a January night shift. Yamamoto and Adelstein are eating leftover pizza in the office when their colleague arrives with information from a police source: Gen Sekine, a dog breeder near Kumagaya, is suspected of being a serial killer. Several people associated with Sekine appear to have disappeared over the preceding decade. An earlier police inquiry had stalled after the first three disappearances, and the original case had largely faded from attention. Yamamoto’s newsroom therefore faces a story with both a current lead and a neglected history to recover.

Yamamoto acknowledges Adelstein’s objection that proceeding is a terrible idea, but says that this is how the work sometimes breaks. He then makes the investigation the paper’s most important story and gives each reporter a missing person to research. Adelstein is assigned Yasunobu Endo and Endo’s driver, Wakui, both of whom are missing. The assignment is concrete: establish each victim’s connection to Sekine, last known sighting, character, possible motive for the killing, and any other information that could matter later. Yamamoto asks for photographs, comments, and testimony, making clear that the work must build a record rather than rest on suspicion alone.

The assignment also follows from Adelstein’s beat. Because he covers the Saitama Organized Crime Control Bureau, Yamamoto considers him a natural choice to investigate Endo, whom he identifies as a yakuza. In this way, Yamamoto turns a reporter’s existing access into an investigative responsibility, and gives the wider inquiry a division of labor. Adelstein later describes this assignment as the beginning of his Year of the Dog.

Sources, Judgment, and Collaboration

Yamamoto’s management extends to the cultivation of police sources. When Adelstein finds a possible new contact, Sekiguchi, Yamamoto is pleased: the paper is still on the police shit list, so each new source matters. His response is not merely congratulations. He immediately asks what approach Adelstein will use and whether Sekiguchi has children, pressing him to think strategically about how to establish a conversation. Source-building, in Yamamoto’s view, requires preparation as well as access.

That practical outlook recurs in the Blackman investigation. When senior police reporter Nishijima asks Adelstein to help cover Lucie Blackman’s disappearance, the case has not yet been officially announced and its details remain uncertain. Nishijima warns Adelstein to keep quiet. Yamamoto joins the briefing and helps define the reporting task: speak with people at the house where Lucie had been staying and look around Tokyo Roppongi for people who knew her, including possible customers. The instruction assigns Adelstein an area of inquiry even though he is unfamiliar with, and personally avoids, that nightlife district.

Yamamoto is also connected to the police beat through his work with Nishijima, his right-hand man. Both cover violent and international crimes for the Tokyo Metropolitan Police Department. Their collaboration places Yamamoto within a reporting operation that handles sensitive investigations, while his direction of Adelstein shows how that institutional beat can draw in a reporter whose usual coverage lies elsewhere.

Narrative Role and Significance

Across these episodes, Yamamoto functions as a manager who makes risk legible without pretending to remove it. In the Saitama case, he can agree that proceeding is dangerous and still assign the reporting; in the Blackman case, he can send Adelstein into unfamiliar territory because the investigation needs witnesses and leads there. His judgments are practical rather than reassuring: warnings about secrecy, attention to source strategy, and detailed assignments are the tools he uses to keep difficult reporting moving.

The book gives little personal background for Yamamoto, and his characterization rests chiefly on these newsroom actions. Their cumulative effect is substantial. He turns the vanished people in the Saitama inquiry into individual reporting assignments, insists on evidence that may become useful as the case develops, and directs Adelstein toward a missing-person investigation before the paper has a public announcement to work from. Yamamoto’s importance lies in this combination of editorial authority and working participation: he helps decide not only which stories matter, but what reporters must do to make them reportable.