Genie Hoshino's household registration exchange and identity transformation

Makoto Hara’s family-register exchanges were not simply a matter of using another name: they repeatedly changed the identity under which he could be recognized by the state and by the people around him. Kido’s investigation gradually reconstructs a possible sequence in which Hara first became Yoshihiko Sonézaki and later lived as Daisuké Taniguchi, while the real Daisuké may have been left with Hara’s former identity. The proposed chain explains how Hara could appear in official records as a real person with a documented past, even though the brother who saw his photograph insisted he was not Daisuké.

Registers, Records, and the Possibility of Exchange

A family register exchange was more consequential than ordinary impersonation. In a 2007 case Kido found while researching social-security fraud, a fifty-five-year-old man had traded registers with a sixty-seven-year-old by mutual agreement. One wanted to receive the other’s pension; the other wanted to persuade his fiancée that he was younger and had never been married. The exchange drew criminal charges for false entries in an official electronic document and sharing that document. The case established for Kido that a person’s registered identity could be transferred through an arrangement between two people, not merely faked in conversation or on an isolated form.

A third person had brokered that exchange. Although initially given a suspended sentence as an accomplice, the broker was later imprisoned for an investment scam involving a nonexistent business. Kido learned that he had arranged other family-register exchanges for a fee. This intermediary made a connection between the legal case and the year Hara’s presumed history shifted: 2007 was also when Daisuké moved out of his apartment in Osaka and X appeared in Town S. Kido began to suspect that the two men might have met through the broker, whom he then visited at Yokohama Prison.

The investigation also places this mechanism within a broader history of administrative legibility. Japan’s registers began as tools of governance, including policing and tax collection, and later recorded details such as birth, marriage, adoption, address, occupation, and death. Yet people could remain outside those records. The problem was not only that records could be exchanged: people without a register could be excluded from the official account of who had been born, lived, or died. For Kido, the possibility that a person’s identity could be moved between registers made the state’s records both powerful and incomplete.

Kido’s First Reconstruction

Kido’s initial inference connected Hara to Kenkichi Kobayashi, whose son he suspected X might be. The possibility gained force when Kido learned that Hara and the register broker had both been held at Yokohama Prison. Their likely contact as fellow inmates made an exchange seem plausible, and Kido imagined that the man known as X was the real Makoto Hara, while a man later imprisoned for compulsive shoplifting had taken Hara’s register through the broker.

That theory also offered Kido an explanation for why Hara might have wanted a new past. If X was Kobayashi’s son, Kido reasoned, he could have been seeking distance from the terrible crime associated with his father. This remained an inference rather than a confirmed account. It nonetheless affected Kido personally: imagining Hara as someone burdened by circumstances beyond his control helped Kido feel some relief from his own anxiety. When fresh information unsettled his picture of Hara, that emotional investment was shaken too.

Kido’s next reconstruction began with the man who called himself Makoto Hara, whom he and Kadosaki met at a café near Higashi-Nakano Station. Kido had expected to speak with the person whose family-register age matched his own, but the man before him appeared to be at least in his late forties or fifties. The mismatch between the name and the person reinforced the possibility that more than one register exchange lay behind the identity.

Using a clue from Omiura, Kido inferred that the man’s real name was Yoshihiko Sonézaki. In this version, Hara had first exchanged registers with Sonézaki and lived for a time under that name. He then encountered Daisuké and exchanged registers with him—or, Kido allowed, may have taken Daisuké’s register without consent. Hara consequently became Daisuké Taniguchi and eventually met Rié in Town S. If that account was right, the real Daisuké had become Yoshihiko Sonézaki, assuming he was alive and had not exchanged registers again.

Revision of the Sequence

A further complication came from Shozo Tashiro, a mentally disabled drifter whom Kido believed Hara might have encountered during the chain of exchanges. The idea that Hara had passed his own register to Tashiro troubled Kido because it seemed incompatible with Rié’s memory of a kind husband. Tashiro’s uncertain testimony suggested that he had not met the real Hara at all, but someone using Hara’s name. Kido therefore revised the sequence: Hara’s first exchange was probably not with Tashiro, and a different man may have passed Hara’s unwanted identity on to him.

Kido identified that intermediary in his revised theory as the person who had originally been Yoshihiko Sonézaki, the name appearing on one of Omiura’s postcards. From Hara’s perspective, the likely sequence was now that he learned of Omiura through the internet or another source, became Sonézaki, and then, dissatisfied with that identity for an unspecified reason, exchanged registers with Daisuké and went to Town S. The possibility of a further exchange with Tashiro was no longer necessary to explain the evidence Kido had gathered.

The new account remained conditional. Kido could not establish whether each exchange was mutual, whether Hara had ever taken an identity without its holder’s consent, or whether Daisuké was still alive. Nor could he know whether the real Daisuké had remained Sonézaki or changed identities yet again. The record supported a sequence of increasingly plausible hypotheses, not a fully verified itinerary.

Official Identity and Its Consequences

The identity Hara assumed was supported by more than the name he used socially. Government officials accepted his marriage notification and later his death notification under the name Daisuké Taniguchi. He drove with a license, received medical care using health insurance, and made pension contributions. His account of growing up in Gunma had no apparent discrepancy in the records Kido considered. Yet Kyoichi Taniguchi, Daisuké’s brother, recognized from a photograph that the deceased husband was not the person he knew.

That conflict between documentary identity and personal recognition led to legal consequences for Rié and her daughter Hana. Kido petitioned the Miyazaki Family Court to reverse the record of Daisuké’s death so that the actual Daisuké would no longer remain officially dead while the police had a missing-person report for him. He also sought to remove Daisuké from Rié’s register and restore her maiden name, Takemoto, thereby annulling the second marriage on grounds of error. The court required Rié to appear and requested DNA evidence that X was not Daisuké; Kido gathered hair, nail clippings, an electric razor, and a toothbrush from X’s belongings for testing. The intended correction would erase the marriage from Rié’s register and make Hana legally illegitimate.

The investigation’s uncertainty was therefore not abstract. If Hara had become Daisuké while the real Daisuké became Sonézaki, the official record could preserve one man’s life under another man’s name while making the other difficult to locate. Kido also considered a graver possibility: if Daisuké had been unregistered, or had disappeared in the tsunami, the state might have no recognized identity against which to record his death. That possibility heightened Kido’s concern for Rié, whose tenuous hold on the truth might be further damaged if Hara had killed the real Daisuké. It remained a fear, not an established finding.

A Life Reconstructed from Fragments

The chain of exchanges is significant because each apparent solution changes what the names mean. Hara’s identity as Daisuké is supported by the ordinary machinery of public life, while his resemblance to the real Daisuké is contradicted by family recognition. The register makes one account administratively coherent without making it biographically true. Conversely, a person who has dropped out of the register can become difficult for institutions to recognize even if friends, photographs, and personal effects suggest that he existed.

Kido responds to this instability by writing Hara’s past in detail. As documents and clues bring Hara back into focus, Kido records not only the large turns in the proposed history but also its smaller particulars. His effort is likened to family members gathering the ashes of a relative after cremation: an attempt to recover as much as possible of a life that has already disappeared. Hara’s exchanges can obscure and displace his past, but Kido’s reconstruction restores the sequence as an account Rié can try to understand, without pretending that every link—or Daisuké’s ultimate fate—has been proved.