Bengo4.com Begins Featuring Tachibanashobo's "Keisatsugaku Ronshu (THE JOURNAL OF POLICE SCIENCE)" on Three Services, Including AI Research and Legal Book Subscriptions

Bengo4.com, Inc. (Minato-ku, Tokyo; Taichiro Motoe, Representative Director, President and CEO, Lawyer; hereinafter, “the Company”) is pleased to announce that it has begun featuring "Keisatsugaku Ronshu (THE JOURNAL OF POLICE SCIENCE)" published by Tachibanashobo Co., Ltd. on three of its services: the AI agent specialized in legal affairs, "Legal Brain Agent," and the legal book subscription services, "Bengo4.com LIBRARY" and "BUSINESS LAWYERS LIBRARY." Furthermore, our company is the first among legal book subscription services to feature this journal, including back numbers from the past three years.

■Background of the Feature
Since its first publication in 1948, "Keisatsugaku Ronshu (THE JOURNAL OF POLICE SCIENCE)" has been a specialized journal comprehensively covering editorials and materials related to police practice and police science, including police administration, criminal police, and traffic police. For practitioners handling criminal cases, it is an important resource for deeply understanding the operations and interpretations of investigative authorities. However, until now, there have been restrictions on comprehensive research in a digital environment. With this new feature (*), users such as lawyers will be able to utilize the knowledge of this historic journal on our platforms.
 *As a law book subscription service.

■About Tachibanashobo Co., Ltd.
Tachibanashobo Co., Ltd. is a publishing company that has specialized in professional books and magazines regarding police practice and police science since its founding in 1945. Reaching its 80th anniversary milestone, the company possesses an enormous amount of knowledge that has supported the development of Japan's police administration. By integrating the company's representative periodical, "Keisatsugaku Ronshu (THE JOURNAL OF POLICE SCIENCE)," into our digital foundation, we will continue to support the future of research in criminal practice.

■ About Legal Brain Agent


Legal Brain Agent is an AI agent specialized in legal affairs that is equipped with the Legal Brain legal-specialized AI platform developed exclusively by the Company. It understands the user’s research intention through natural language input, clearly indicates links to the sources (*1) that are used to produce the answer, automatically extracts legal issues, and presents them in an easy-to-understand bullet-points format. It considerably reduces complex, time-consuming, and labor-intensive research tasks, helping to create an environment where lawyers, legal staff, and other professionals can concentrate on more value-added work.
*1: Relevant laws and regulations, precedents, technical books, guidelines, etc.
URL of the website for the service: https://legalbrain.com/



■ What is Bengo4.com LIBRARY?
It is a legal research service that enables users to search approx. 3,500 law books and journals (as of July 2025) using keywords and AI-based natural language processing technology and view the books they wish to. The service saves lawyers the time they would otherwise spend searching for information in very thick law books, enabling them to complete tasks such as considering the best course of action for dealing with a case and preparing the necessary documents more efficiently.
https://library.bengo4.com/about