Japanese police duty to keep information confidential

The Japanese police duty to keep information confidential is presented as both a legal obligation and a practical danger for the people who share information with reporters. The book traces its effects beyond the officer who may face prosecution or lose a job: it reaches into the press-club system, the handling of sensitive scoops, and the measures a journalist takes to shield sources whose exposure could put their lives at risk.

Duty and Risk

Jake Adelstein explains that a police officer who leaks information to a reporter can be criminally prosecuted and may certainly lose his job. The prospect of punishment makes confidentiality more than an abstract rule: it sets a personal cost on cooperation with the press. The consequences extend to other sources as well. A yakuza who reveals organizational secrets or works with a journalist may pay with his life, making source protection a matter of physical safety as well as professional discretion.

The rule therefore governs a vulnerable information chain. The information may be valuable to the public and important to an investigation, but the person who supplies it bears risks that a published story may not show. Adelstein says he considered how the book could be written without endangering sources or adversely affecting the people involved, and describes protecting their identities as a serious responsibility.

Access and Informal Exchange

The book places this duty within a police press system that regulates who can enter and receive information. At the Tokyo Metropolitan Police Department, the ninth floor housed public affairs and three press clubs: one for newspapers, one for television, and one for radio and local newspapers. Weekly and monthly magazines were excluded from the official list, as were foreign media representatives. The arrangement shaped the routes through which news could travel, favoring established domestic outlets with access to the institution.

Formal training did little to explain how reporters should obtain information from officers. New police reporters received a manual, a permanently worn beeper, and sample articles covering categories from homicide and organized crime to purse snatching; that instruction was described as the beginning and end of their formal training. The more consequential work of maintaining relations with police sources was learned informally. A former supervisor’s memo warned that mechanically making the rounds or relying on a newspaper’s name would persuade only a small fraction of officers to provide information. The system depended on personal dealings, even as the officer who leaked remained exposed to punishment.

Publication and Control of Sensitive News

A report on the meeting between Lucie Blackman and Joji Obara shows how a scoop could collide with police plans. After learning that witnesses could establish the meeting, Adelstein passed the information to Yamamoto. The resulting article gave the newspaper a scoop, but angered the police department, which had wanted to surprise Obara; other newspapers reported the information roughly a week later. The episode makes the tension concrete: information obtained through a source could serve public reporting while disrupting an investigation’s preferred timing.

Later, Adelstein encountered a different set of filters when he tried to publish his investigation of Tadamasa Goto’s dealings with the FBI. The article was refused by the outlets he had counted on. Some cited its age, concern about making the National Police Agency look foolish, or uncertainty that the FBI would confirm it; one prospective publisher feared legal costs, retaliation, and damage to its business relationships. Adelstein also sent a copy to his newspaper before publication and received no response. These examples are not themselves applications of the police confidentiality rule, but they show how information can be delayed or suppressed at successive stages, for reasons that include institutional reputation, legal exposure, commercial interests, and safety.

Protection and Consequences

Adelstein describes changing names, using nicknames, altering nationalities, and modifying identifying details to protect sources. He presents these changes as an effort to balance concealment with accuracy, not as a reason to treat source safety as secondary. That practice follows from the uneven risks built into the reporting relationship: an officer can face prosecution or dismissal for a leak, while a source inside organized crime may face lethal consequences for disclosure.

The duty thus has effects beyond secrecy within the police. It influences which information can be shared, the personal relationships reporters cultivate to obtain it, the timing of publication, and what a journalist can safely identify in print. The book’s account keeps the central tension unresolved: confidentiality can protect sensitive information, while strict control over access and the dangers attached to disclosure can also narrow the path by which important facts reach the public.