Japan mother sues state over teen’s ‘hostage justice’ death

The mother of a 16-year-old girl who died from severe emaciation after an 18-day detention and intense interrogations by Japanese authorities has filed a lawsuit seeking compensation. The case highlights the controversial "hostage justice" system prevalent in Japan.

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My daughter was unrecognisable when she died.

Runa, a pseudonym used in the complaint, was arrested in June 2025 for allegedly assaulting a patient at a care facility where she worked. Her family maintains she was only trying to prevent the patient from biting another person. Despite her claims of innocence, she was detained for 18 days, during which she was denied family contact and repeatedly pressured to confess. Five months after her release, she weighed only 20 kilograms and subsequently died in December.

Her mother stated at a news conference, "My daughter was unrecognisable when she died. I want to know what happened to her, and why she was arrested, detained and had to die." The lawsuit seeks 100 million yen (approximately $802,300) in damages, labeling Runa as "one of the most tragic victims of hostage justice."

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I want to know what happened to her, and why she was arrested, detained and had to die.

Critics argue that Japan's criminal justice system often presumes guilt and relies heavily on confessions. Suspects who refuse to confess or remain silent may face lengthy pre-trial detentions, with confessions becoming a de facto condition for release. Runa's lawyer, Masahiro Sasaki, cited investigators as threatening her with reformatory school and the inability to see her mother if she did not confess. Runa was diagnosed with acute stress, eating disorders, and post-traumatic stress disorder as a result of the ordeal.

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You did it, didn’t you? Just tell the truth.