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Activities of National Research Institute of Police Science

As the central organization of police science in Japan, this institute is staffed with approximately 100 qualified researchers who are knowledgeable in police science. They are engaged in a broad range of analysis, identification, and research work that requires specialized knowledge and skills in biology, medicine, science, chemistry, pharmacy, physics, agriculture, engineering, sociology, education, psychology, and other disciplines. The institute has now established both a domestic and an international reputation in the field of police science.

Research and Development

Numerous research projects are drawn up every year to cope with a growing number of crimes and accidents brought about by diversified social and economic statuses. In accordance with these projects, a variety of research is undertaken to improve criminal investigation techniques and to prevent crime and juvenile delinquency. They are also designed to implement countermeasures for traffic accidents, traffic congestion, and pollution. The work of this institute is inevitably broadening in scope.

Analysis and Identification

From the viewpoint of promoting scientific criminal investigation, the analysis and identification of criminal evidence has been the fundamental objective of this institute ever since its establishment. Such analysis and identification is requested not only by the police organization, but also by the courts and the public prosecutor's office. All counterfeit currencies discovered and firearms and bullets seized in connection with crimes are exclusively and systematically analyzed at this institute. In this respect, the institute is greatly contributing to the arraignment of criminals in courts of justice.


In view of the rapid progress in science and technology, it is of paramount importance to innovate and standardize the techniques of scientific criminal investigation based on sound principles of methodology. For this reason, a series of training courses in major fields of forensic science is provided at the Training Center of Forensic Science for all scientists in Prefectural police laboratories nationwide.
The Training Center also hosts several international seminars to help developing countries improve their identification techniques.
The researchers also help local police scientists improve their techniques by advising them on cases and by hosting seminars.