An internal police review criticized a "dysfunctional" investigative chain of command that led to three officials of a Yokohama-based company being falsely accused of exporting equipment that could be used as biologial weapons. 

The Tokyo Metropolitan Police Department, the National Police Agency and the Supreme Public Prosecutors Office announced on Aug. 7 the findings that outlined issues with the investigation of Ohkawara Kakohki Co. and bail procedures.

While 19 officials from the MPD’s Public Security Bureau at the time of the investigation were disciplined, no disciplinary action was taken against any prosecutors.

“I once again deeply apologize to the three individuals arrested and everyone else investigated for the significant trouble and anguish we put them through,” MPD Chief Yuji Sakoda said at a news conference. 

Yoshinobu Kusunoki, commissioner-general of the NPA, said, “Public security and foreign affairs departments nationwide will sincerely reflect on the shortcomings revealed in this case and will ensure that measures are implemented to prevent a recurrence.”

In response to the release of the probe, Ohkawara Kakohki, which manufactures and exports spray dryers, held a news conference on the same day.

Masaaki Okawara, 76, the company president and one of the three individuals who were arrested, expressed his disapproval, saying that the review left “personal accountability extremely vague.”

“This is because the review was conducted internally,” he said.

Ohkawara Kakohki had been calling for an independent review that includes a third party.

The MPD’s review was based on the finalized court ruling that fully acknowledged the illegality of the Public Security Bureau's investigation.

The review concluded that the chain of command was flawed in its operation because senior officials including the head of the bureau failed to properly direct the investigation, leading to “grave errors” such as the unlawful arrests.

The probe listed specific problems, such as that investigators failed to reconsider their own interpretation of the regulations—even after the trade ministry raised doubts.

Furthermore, when an experiment with the company's equipment produced results that contradicted the investigation's premise, investigators neither conducted a follow-up inquiry nor shared the findings with senior Public Security Bureau officials and prosecutors.

The review also addressed the MPD’s actions after the indictment was withdrawn. It withdrew the MPD’s claim in the state compensation lawsuit that the testimony of active-duty police officers—who stated that the case was a “fabrication”—was purely “grand fiction.”

The review stated that this action “could discourage officers from freely expressing their opinions in the future.”

The Supreme Public Prosecutors Office, in its own review report, pointed out that prosecutors had failed to properly evaluate exculpatory evidence that could have weakened the suspicion of guilt when they decided to indict.

Regarding their continued opposition to bail requests, the review noted that their response “must be described as inappropriate.”

The state compensation lawsuit revealed that when an investigator suggested revisiting the MPD’s case strategy, a senior official shut the possibility down, saying, “Will you take responsibility for dropping the case?"

However, the MPD’s review did not acknowledge this exchange.

Tsuyoshi Takada, a lawyer representing Ohkawara Kakohki, said that the review was insufficient.

Takada criticized the disciplinary action taken against the police officers as “too lenient,” stating, “This is a direct reflection of the inadequate review.”

Takada also called the lack of any punishment for prosecutors a “very serious problem.”

In its report, the Supreme Public Prosecutors Office acknowledged that the prosecutor’s continued opposition to granting bail to Shizuo Aishima, a company adviser who died after his release was denied, was “inappropriate.”

Takada praised this specific finding.

On the other hand, there has been no move for a review by the judiciary, which denied the bail request.

“We are not demanding a formal review," Takada said. "We just want them to learn from this case and recognize that their work can cost a person their life.”

The bereaved family of Aishima, which has not accepted an apology from the officials, did not attend the company's news conference.

Takada read a statement from Aishima’s eldest son, which said, “It is a step forward that they have established some solid preventative measures. We will now deliberate on how we would like to be apologized to.”

(This article was written by Hiraku Higa, Hikaru Yokoyama, Yusuke Morishita, Noriki Nishioka and senior staff writer Shimpachi Yoshida.)