Hana's legal status as illegitimate

Hana's legal status as illegitimate results from the annulment of her mother Rié’s second marriage. Because X had married Rié while impersonating Daisuké Taniguchi, correcting the family register erased that marriage—and left Hana, their child, legally illegitimate.

The false identity and the register

X had lived with Rié and fathered Hana while using the name Daisuké Taniguchi. Yet Daisuké was a real person, and official records had recognized X as him: government officials updated the family register for the marriage and later recorded his death under the same identity. The discrepancy was exposed when Daisuké’s brother Kyoichi saw a photograph of the deceased man and said he was not his brother.

When Rié sought help, the police did not resolve the identity question. The detective had Kyoichi file a missing-person report for Daisuké, then later told Rié that no matching person had been found and that there was no way to investigate at that time. The uncertain identity was therefore not just a private family matter: it was entangled with official records that had treated X as Daisuké.

Annulment and its legal consequence

Kido proposed correcting the connection between Rié’s and the Taniguchi family registers. Since X was not Daisuké, Rié agreed that she should stop using the Taniguchi name. Kido petitioned the Miyazaki Family Court to reverse the record of Daisuké’s death and remove the purported marriage from Rié’s register, restoring her maiden name, Takemoto. The marriage was to be annulled on the grounds of error; as a direct consequence, Hana would become legally illegitimate.

The court required Rié to appear in person and requested DNA evidence that X was not Daisuké. Kido gathered samples from X’s personal effects, including hair from his clothes, nail clippings, an electric razor, and a toothbrush. Five months after the petitions were filed, around the first week of August, both were approved. The DNA test established that X was not Daisuké, and Rié’s second marriage was erased from the records. She was no longer recorded as a widow and had, in the corrected official account, been married only once.

A corrected record, a changed family

The ruling did not merely correct a clerical error. It altered the legal account of Hana’s parentage: the marriage through which Rié and X had formed their family no longer existed in the register, and Hana became its legally illegitimate child. The episode shows how official identity depends on documentary recognition. The same register that had allowed X to be recognized as Daisuké could, once corrected, erase his marriage to Rié and change the status assigned to their daughter.

The consequences unfolded alongside the family’s continuing attachment to the name Taniguchi. Yuto, Rié’s older son, asked to keep that surname even after Rié returned to Takemoto, explaining that it was the name by which his schoolmates knew him and that abandoning it felt wrong to him on his father’s behalf. His plea concerns his own name, not Hana’s legal status, but it makes visible the difference between a family’s lived bonds and the categories imposed by a corrected register.