The “Legal Brain” Initiative and the Addition of the “Hanrei Hisho” Case-Law Database as a Subsidiary
First written in FY2024-Q2. 15 of 18 entries say "Advanced", first in FY2024-Q3. Latest entry: 2026-10-02.
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- 2026-09-25Advancedvoix.jp
「Bengo4.com,Inc. has begun providing Mitsubishi UFJ Trust and Banking Corporation with its integrated legal AI agent, “LegalBrain Agent.”」
Following the release of its legal AI agent, the “LegalBrain” initiative has progressed to the implementation phase, marked by the start of actual delivery to financial institutions. - FY2026AdvancedAnnual report
「In May 2025, we also launched the legal-field AI agent “Legal Brain Agent,” strongly supporting the improved efficiency of professionals engaged in legal work and further accelerating the realization of our mission, “creating the next common sense through Professional Tech.”」
Regarding the “Legal Brain” initiative, the Company released a legal-focused AI agent in May 2025 and advanced to the service delivery stage. - FY2025AdvancedAnnual report
「At “Bengo4.com,” we focused on providing useful content to users and improving usability, while working to develop products for lawyers by strengthening collaboration with “Hanrei Hisho” and “Bengo Kakumei.”」
The Company described enhanced integration between the case-law database “Hanketsu Hisho” and the digital document management tool “Bengo Kakumei” as concrete progress in product development for lawyers. - FY2024-Q3AdvancedAnnual report
「Business combination date 2 October 2023 (deemed acquisition date: 1 October 2023) Voting rights acquired 100.00%」
The Company acquired 株式会社エル・アイ・シー with a 100% voting interest, establishing a concrete foundation for advancing the “Legal Brain” initiative using case-law data. - FY2024-Q2First statedAnnual report
「With the mission of “creating the next standard through professional tech,” the Company is pursuing the enhancement of corporate value over the medium to long term. It has identified the development of “Legal Brain,” Japan's first proprietary legal-focused LLM trained on a broad range of legal data, as one of its key strategies and is developing legal services unlike any previously available. The case-law data held by “Hanketsu Hisho” consists of carefully selected important Japanese cases from the 1900s to the present and is an immeasurably valuable data asset. By bringing the two companies together, the Company believes it can expand services in the case-law database field and, through the expansion of both companies' customer bases and the integration of their legal-industry expertise and technologies, develop services that enhance the value of “Hanketsu Hisho” and advance the “Legal Brain” initiative.」
On 2 October 2023, the Company acquired all issued shares of 株式会社エル・アイ・シー and made it a subsidiary, first explicitly stating its plan to develop its proprietary LLM “Legal Brain” and new legal services by leveraging the data, customer base, and legal-industry expertise of the case-law database “Hanketsu Hisho.”