The National Police Agency is an agency administered by the National Public Safety Commission of the Cabinet Office of the Cabinet of Japan, and is the central agency of the Japanese police system, and the central coordinating agency of law enforcement in situations of national emergency in Japan. Unlike comparable bodies such as the U.S. Federal Bureau of Investigation, the NPA does not have any operational units of its own except for the Imperial Guard. Instead, its role is to supervise Prefectural police departments and determine general standards and policies; although in national emergencies or large-scale disasters the agency is authorized to take command of Prefectural police departments. As of 2017, the NPA has a strength of approximately 7,800 personnel: 2,100 sworn officers, 900 guards and 4,800 civilian staff.
Background
were placed under complete centralized control with the Police Affairs Bureau of the Home Ministry at their core. But after the surrender of Japan, the Supreme Commander for the Allied Powers regarded this centralized police system as undemocratic. During the Occupation, the principle of decentralization was introduced by the 1947 :ja:警察法|Police Law. Cities and large towns had their own municipal police, and the National Rural Police was responsible for smaller towns, villages and rural areas. But most Japanese municipalities were too small to have a large police force, so sometimes they were unable to deal with large-scale violence. In addition, excessive fragmentation of the police organization reduced the efficiency of police activities. As a response to these problems, complete restructuring created a more centralized system under the 1954 amended Police Law. All operational units except for the Imperial Guard were reorganized into prefectural police departments for each prefecture, and the National Police Agency was established as the central coordinating agency for these Police Departments.
The Community Safety Bureau is responsible for crime prevention, combating juvenile delinquency, and pollution control. This bureau was derived from the Safety Division of the [|Criminal Affairs Bureau] in 1994.
Community Safety Planning Division
Community Police Affairs Division
Juvenile Division
Safety Division
Cybercrime Division
Director for Economic Crimes Investigation
Criminal Affairs Bureau
The Criminal Affairs Bureau is in charge of research statistics and coordination of the criminal investigation of nationally important and international cases.
* Director for International Investigative Operations
Traffic Bureau
The Traffic Bureau is responsible for traffic policing and regulations. This bureau was derived from the Safety Bureau in 1962 because of the expression indicating a high number of deaths from traffic accidents.
After the 1996 Japanese embassy hostage crisis in Peru, the Security Bureau established the Terrorism Response Team where officers liaise with foreign law enforcement and intelligence agencies when Japanese interests or nationals are in danger. It was later reformed to the Terrorism Response Team - Tactical Wing for Overseas in order to meet with demands to coordinate with foreign police forces in assisting them whenever a terror attack has happened.
There are six Regional Police Bureaus, each responsible for a number of prefectures as below: ;Tōhoku region ;Kantō region ;Chūbu region ;Kansai region ;Chūgoku region ;Kyushu region They are located in major cities of each geographic region. The Tokyo Metropolitan Police Department and Hokkaido Prefectural Police Headquarters are excluded from the jurisdiction of regional police bureaus. Headed by a Senior Commissioner, each regional police bureaus exercises necessary control and supervision over and provides support services to prefectural police within its jurisdiction, under the authority and orders of NPA's Commissioner General. Attached to each Regional Police Bureaus is a Regional Police School which provides police personnel with education and training required of staff officers as well as other necessary education and training.
Police Communications Departments
Metropolitan Tokyo and the island of Hokkaidō are excluded from the regional jurisdictions and are run more autonomously than other local forces, in the case of Tokyo, because of its special urban situation, and of Hokkaidō, because of its distinctive geography. The National Police Agency maintains police communications divisions in these two areas to handle any coordination needed between national and local forces. In other area, Police Communications Departments are established within each Regional Police Bureaus.
Independent Communications Departments
*Tokyo Metropolitan Police Info-Communications Department
*Hokkaidō
Subsidiary Organs
National Police Academy
National Research Institute of Police Science
Imperial Guard #Imperial Guard of the National Police Agency