|Public Security Bureau|
|Active||1945 - present|
|Agency||Tokyo Metropolitan Police Department|
The Public Security Bureau (警視庁公安部, Keishichō-kōanbu) is a bureau of the Tokyo Metropolitan Police Department (TMPD) in charge of public security with jurisdiction over the Tokyo metropolis. It has a force of more than 2,000 officers. The bureau reports to the Deputy Superintendent General.
In the Japanese police organization, only the Metropolitan Police Department becomes "the bureau" where the security police branch becomes independent. In other prefectural police forces, the Public Security Section and Foreign Affairs Division are installed in a Security Department. Tokyo is seen as an exception since it had been working with the Japanese National Police Agency for the longest time since they share the same location.
The PSB is not the Japanese equivalent of the U.S. Federal Bureau of Investigation, despite some claims that it is. It does not concern with ordinary criminal activities. The main focus of the PSB are activities which threaten national security and therefore, their work is similar to Special Branches of British and Commonwealth police forces.
The establishment of the PSB started on December 19, 1945 when the Security Division was established in the Tokyo Metropolitan Police. On February 1946, the SD was changed to the Public Security Division. In April 1952, the PSD's first and second security departments were established with the former taking charge of the TMPD's riot police units while the latter carried out security information operations. In April 1957, the TMPD's ecurity Department 1, Security Department 2, and Metropolitan Police Department Reserve were renamed as the Security Department, the Public Security Department and the Riot Police.
The PSB had been mobilized to investigate all Aum Shinrikyo facilities after the deadly sarin gas attack on the Tokyo subway. Following the discovery of an Aum cultist who had been employed by the Japan Maritime Self-Defense Force after sensitive military information had been leaked out, the PSB had investigated the matter. The PSB had been the leading agency to investigate reports that Aum Shinrikyo had acquired names of 3,000 Honda executives and sensitive data from government ministries and other important facilities via Aum-created software.
The TMPD announced on November 2, 2020 that the foreign affairs division will be revamped to have two separate units to deal with intelligence matters concerning China and North Korea, giving it a total of four separate units.
On December 25, 2022, the PSB produced a promotional video and starred Rena Nōnen aka Non on the dangers of foreign-backed corporate espionage.
The PSB had failed in securing a Russian man wanted for spying in Japanese territory as a suspected agent of the SVR since the 1960s when he left Japan in 1995 and reentered the country several times before being unaccounted for when the spy used a Japanese name to obtain a Japanese passport in Vienna.
An ex-Japanese Air Self-Defense Forces warrant officer had been investigated by the PSB in 2002 for divulging military secrets under the Mutual Defense Assistance Agreement to a Russian GRU operative, who was identified as Aleksei Shchelkonogov. Three activists of the Tachikawa Jieitai Kanshi Tentomura had been said to be prisoners of conscience by Amnesty International when they had arrested by police with the PSB investigating them for conducting anti-war activities after illegally entering an SDF housing complex in Tachikawa in 2004.
PSB officers had been involved in the arrest of former Cabinet Intelligence and Research Office (CIRO) official Toshihiko Shimizu, accused of providing classified data to a Russian embassy official, supposedly posing as a diplomat in 2008. under the National Public Service Law.
On December 15, 2020, PSB officers investigated the activities of a South Korean man living in Tokyo accused of hacking into the Chongryon website and the Korea News Service.
After a discovery of sophisticated radios by police during a raid on a JRCL Revolutionary Marxist Faction safehouse on April 10, 1998, PSB officials had reorganized their communications network to better safeguard it against unwanted intrusions.
In 2014, a report was made thanks to a leak that PSB officers were conducting covert surveillance activities on Muslims residents living in the Greater Tokyo Area.
In the Bureau, there are divisions and units as below:
Prospective PSB officers are trained at the National Police Academy in intelligence gathering techniques.
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