The Noto Peninsula is where Tadao Asai planned to make another man’s death stand for his own, turning a remote location into the hinge between a family’s flight from debt and a decades-long investigation into stolen identities. A newspaper account of a death there eventually lets Kyoichiro Kaga connect the disappearance of Tadao’s former self to Mutsuo Koshikawa, who later lived under the name Shunichi Watabe; the man whose body enabled the deception, however, is never identified.

Setting and the planned escape

The peninsula enters the story through a guidebook. While traveling with his daughter, Hiromi, Tadao opens it to a map of the Noto Peninsula and confirms that their lodging is booked. Hiromi worries whether they have enough money and says she would be content to sleep in a park. Tadao assures her that money will not be a problem. The conversation gives the journey a practical, unsettled quality: the pair are away from home, but Hiromi does not yet know what her father intends to do.

That night, Tadao explains the plan. A body will be found at the foot of a nearby cliff, and the police will ask Hiromi to identify it as her father. He says he has placed the dead man’s fingerprints on the belongings in his bag and made sure the man gripped its handle, so the evidence will point to the corpse rather than to him. Tadao had contemplated leaving the inn while Hiromi slept and jumping from the cliff himself; with another man in his place, he says, he no longer needs to die. If the authorities accept the identification, debt collectors will stop pursuing him, while Hiromi will be placed in official care rather than remain on the run.

Death recorded on the peninsula

An article in the Hokuriku Daily, a newspaper from northwestern Japan, gives the planned substitution a historical trace. Published in October thirty years earlier, it reports that a man fell from a cliff on the Noto Peninsula and died. The article says the corpse was identified through fingerprints on the man’s luggage and a visual identification by Tadao’s daughter. At the time, the police had no reason to pursue the matter further.

That report fits the mechanism Tadao had described: luggage and a daughter’s identification made the dead man legible to authorities as Tadao Asai. Yet the surviving account establishes a mismatch between public record and private reality, not the dead man’s actual name. Kaga later reasons that the person who died was not Tadao, and that Tadao used the death to erase his own existence. The identity of the substitute remains unresolved even after the old report is found.

Evidence carried forward

The peninsula’s significance emerges decades later through the reconstruction of identities from fragments. Tadao had been presumed to have killed himself by jumping from a building near his home, but that account appeared only in the files of Biwa Gakuen Orphanage and had no official corroboration. Former classmates of Hiromi did not remember her father’s supposed suicide. These gaps led Kaga to suspect that Tadao’s death had occurred elsewhere and that the man recorded as dead was someone else.

The newspaper article supplies the missing place and a documented identification procedure. Kaga had already asked Hiromi questions face-to-face; her reactions strengthened his suspicion. He then found the report and saw that the corpse’s identity had been attributed to fingerprints and the daughter’s recognition. Those details do not disclose who the dead man was, but they explain how a false identity could have acquired official force without prompting further investigation at the time.

Other evidence ties the old disappearance to the more recent case. Mutsuo Koshikawa’s apartment contained no personal records or identifying possessions, and investigators found that the address he had supplied when moving to Tokyo was probably false. A timetable recovered in the investigation bore prints establishing that Koshikawa and the man in Sendai who called himself Shunichi Watabe were the same person; the pattern of prints indicated Watabe had handled it more than Kyoichiro Kaga’s mother had. Separately, a radiation-dosage booklet had been issued under Kazutoshi Yokoyama’s name thirty years earlier, suggesting that someone had assumed Yokoyama’s identity around that time.

Kaga’s working reconstruction links these strands: Tadao and Hiromi fled their crushing debts, and the man who later lived as Shunichi Watabe was, Kaga believes, Tadao Asai. He considers the possibility that Kazutoshi Yokoyama died on the peninsula and that Tadao and Hiromi took over Yokoyama’s identity, but says he cannot readily accept that conclusion. At this point it remains a hypothesis rather than a confirmed account. Kaga has obtained a sample of Hiromi’s hair for DNA testing to determine whether she is the daughter of Mutsuo Koshikawa, also known as Shunichi Watabe; the result is still pending.

Narrative significance and unresolved identity

The Noto Peninsula is more than the setting of a reported death: it is where the distinction between a person and the records that certify that person becomes vulnerable to deliberate manipulation. A daughter’s identification, fingerprints on luggage, an orphanage file, a newspaper report, and a later DNA test each offer a different route to identity, and none alone settles the full history. The peninsula’s old death therefore anchors the investigation while also preserving its central blank: Kaga can trace the false death and the assumed name, but cannot identify the man who actually died.