The family of a Japanese man who died in custody after being wrongfully arrested has filed a lawsuit against the state, alleging that a systemic failure in the judiciary led to his death. The lawsuit, filed on April 6, seeks to hold judges accountable for repeatedly denying bail to a terminally ill man in a practice critics describe as Japan’s “hostage justice” system.
Shizuo Aishima, a 72-year-aged engineer and executive at machinery manufacturer Ohkawara Kakohki, died in 2021 after spending eleven months in pre-trial detention. His family is now seeking ¥170 million (approximately US$1.1 million) in damages, arguing that his prolonged confinement was unnecessary and inhumane.
The case has become a flashpoint for advocates demanding reform of a criminal justice system that they argue prioritizes confessions over the presumption of innocence. For Aishima’s widow and two sons, the legal battle is not merely about financial compensation, but about uncovering why a man with stomach cancer was kept behind bars until his death.
“My husband mumbled to me from his cell, ‘is this really the way a human being should be treated?'” his widow said during a news conference. “I desire to grasp the reason why they kept rejecting bail to someone who was terminally ill.”
The Ohkawara Kakohki Case
The ordeal began in March 2020 when Japanese authorities arrested three executives from Ohkawara Kakohki. The men were accused of illegally exporting industrial spray dryers to China, with prosecutors alleging the equipment could be converted for military use. But, the foundation of the case crumbled shortly after Aishima’s death.
Prosecutors eventually dropped all charges against Aishima and the other two executives. A court later ruled that the police investigations had been illegal, leading law enforcement to issue an apology and ordering that damages be paid to the company. Despite the collapse of the criminal case, the family argues that the judicial mechanism that kept Aishima detained remains unbroken.
The lawsuit specifically targets the judicial process, noting that 37 different judges were involved in renewing Aishima’s detention warrants. The plaintiffs argue this represents a “structural and organisational” failure rather than a series of isolated errors.
| Date/Period | Event |
|---|---|
| March 2020 | Aishima and two other executives arrested over exports to China. |
| 2020–2021 | Repeated bail denials despite a stomach cancer diagnosis. |
| May 2021 | Shizuo Aishima dies in detention at age 72. |
| Post-Death | Prosecutors drop all charges; court rules police investigation illegal. |
| April 6 | Family files state lawsuit seeking ¥170 million in damages. |
Understanding ‘Hostage Justice’
The term “hostage justice”—or hitojichi shio in Japanese—refers to a perceived pattern where suspects are held in prolonged pre-trial detention to coerce confessions. Under this system, bail is frequently denied to suspects who maintain their innocence, effectively holding them as “hostages” until they admit to the alleged crime.
Takashi Takano, the lead lawyer for the Aishima family, explained that judges often view a confession as evidence that a suspect has accepted responsibility and therefore lacks the motive to flee or destroy evidence. Conversely, those who deny the charges are viewed as flight risks, regardless of their health or family ties.
This systemic issue has drawn international scrutiny, most notably during the 2018–2019 detention of former Nissan chairman Carlos Ghosn. Ghosn’s experience brought global attention to the lack of legal counsel during interrogations and the extreme length of pre-trial holds in Japan. Similarly, the case of Iwao Hakamada—once the world’s longest-serving death-row inmate—highlights the dangers of coerced confessions. Hakamada’s convictions were quashed in 2024 after the Supreme Court ruled his original interrogations were “inhumane” (as reported by international observers).
The State’s Defense and Human Rights Concerns
The Japanese government has consistently denied that its legal framework encourages the coercion of suspects. On its official website, the Ministry of Justice maintains that the criminal justice system does not force confessions through undue custody and that “strict requirements and procedures” are in place to guarantee human rights.
However, human rights organizations continue to flag Japan’s reliance on confessions as a violation of international standards. The Amnesty International and other rights bodies have repeatedly called for the mandatory recording of all interrogations and a more robust presumption of innocence to prevent wrongful deaths in custody.
The Aishima case is part of a growing trend of lawsuits aimed at raising awareness. Other high-profile figures, including a former chairman of the publishing house Kadokawa who was arrested in 2022 over Olympic-related bribery charges, have also challenged the boundaries of pre-trial detention.
Disclaimer: This article is provided for informational purposes only and does not constitute legal advice.
The court is expected to review the evidence regarding the 37 judges’ decisions and the medical necessity of Aishima’s release. The next phase of the proceedings will likely focus on whether the state can prove that the detention was justified under the laws existing at the time, or if the “hostage justice” framework led to a preventable death.
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