Bengo4.com, Inc., Anderson Mori & Tomotsune and Mirai Translate, Inc. Jointly Launch Japan’s First Multi-Agent Collaboration Demonstration Testing in the Legal Field

Bengo4.com, Inc. (Minato-ku, Tokyo; Taichiro Motoe, Representative Director, President and CEO, Lawyer; hereinafter, the “Company”) is pleased to announce the launch of a demonstration test aimed at bringing innovation to legal affairs. The test will be run in collaboration with Anderson Mori & Tomotsune (Chiyoda-ku, Tokyo; hereinafter, “AMT”) and Mirai Translate, Inc. (Shibuya-ku, Tokyo; Daisuke Torii, President and Representative Director; hereinafter, “Mirai Translate”).

This demonstration testing verifies the effectiveness of multi-agent collaboration by utilizing Model Context Protocol (MCP), a standard protocol that connects AI agents. This is the first time in Japan that AI with a specific specializing is being linked with general-purpose chat-based AI to verify practical usefulness in legal practice*.

*According to the Company’s research, as of October 10, 2025

■ Background: The first step in the legal field toward a multi-agent era where AI agents collaborate

In recent years, a number of AI agents that perform tasks autonomously have appeared, likely heralding a multi-agent era when multiple agents work together to perform a single task. However, there are still relatively few concrete examples of collaboration, especially practical examples in specialized fields. In the past, legal practice had to use different AI services separately for different purposes, such as general research, legal research, and writing documents.

This posed a problem, as each service had a different interface, meaning that the same context had to be re-entered as a prompt each time, thus breaking up the user experience.

Now, AMT, Mirai Translate, and Bengo4.com are working together to demonstrate multi-agent operation and presenting a practical model case of AI collaboration in the legal field.

■ Overview: Linking general-purpose chat-based AI with AI specialized in legal affairs to verify the effectiveness of multi-agent collaboration in legal practice with secure handling of confidential information

This demonstration testing will use MCP to link a secure general-purpose chat-based AI agent developed by Mirai Translate with the Company’s AI agent Legal Brain Agent that specializes in legal affairs to verify whether the user experience of actual legal work can be improved and productivity dramatically improved. AMT is responsible for providing legal knowledge and verifying productivity improvements in practical scenarios, so this is an initiative that pioneers a way to use AI to perform highly confidential tasks that were previously treated with caution when it comes to external use. This initiative is expected to become a standard model for secure AI operations in the legal industry.

[About the demonstration testing]

1. Improved experiences through seamless AI collaboration

The service links the secure general-purpose chat-based AI agent developed by Mirai Translate with Bengo4.com’s AI agent Legal Brain Agent, which specializes in legal affairs. It allows users to call the AI specialized in legal affairs from the general-purpose chat-based AI to get expert answers. The service verifies the convenience of offering users everything from answers to general questions to advanced legal research through a single general-purpose chat-based AI agent without having to switch between multiple AI tools.

2. Verifying the effectiveness of linking general-purpose and specialized AI

Authentication and permission settings as well as scope of responsibility for output are defined in the process of inter-AI collaboration, while the security of confidential information is ensured by encrypting communication paths and other measures. Verifying these functions allows the companies to evaluate the feasibility of an environment where AI can be safely and efficiently utilized for highly confidential legal tasks for which external use has conventionally been avoided.

■ Company comments on the demonstration testing

Wataru Shimizu, Partner, Anderson Mori & Tomotsune

We are now seeing innovative AI tools that support legal work smartly and securely with overwhelming efficiency. Developed with an ear to the ground in the field, this tool keeps evolving. Enjoy a new experience of mastering multiple AI agents with a simple UI. This is an opportunity for legal affairs to focus on true added value.

Daisuke Torii, President and Representative Director, Mirai Translate, Inc.

Beyond translation, toward legal affairs. Through this partnership with Anderson Mori & Tomotsune and Bengo4.com, we are pleased to contribute to the new domain of improving productivity in legal affairs through our AI development capabilities and natural language processing knowledge. I am confident that combining our know-how centering on AI will let us have an impact that will change the way legal work is done.

Yuji Inagaki, General Manager of the Legal Brain Development Department, Bengo4.com, Inc.

This demonstration testing represents a new endeavor to securely link our AI agent Legal Brain Agent that specializes in legal affairs with a general-purpose chat-based AI. We believe that multi-agent collaboration using MCP can seamlessly connect previously fragmented user experiences and create an environment where professionals can use AI more efficiently and with peace of mind. Through this initiative, we offer new possibilities for the use of AI in legal practice and contribute to the evolution of the industry as a whole.

■ About Legal Brain Agent

Legal Brain Agent is an AI agent specialized in legal affairs that is equipped with the Legal Brain 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 creating an environment where lawyers, legal staff, and other professionals can concentrate on more value-added work.

*1: Relevant laws and regulations, court precedents, technical books, guidelines, etc.

■ About Anderson Mori & Tomotsune https://www.amt-law.com/

Head office | Otemachi Park Building, 1-1-1 Otemachi Chiyoda-ku, Tokyo

Business activities | Anderson Mori & Tomotsune (AMT) is one of the largest general law firms in Japan, handling a wide range of domestic and international corporate legal affairs, possessing extensive experience in a broad range of fields, including cross-border transactions, M&A, compliance, dispute resolution, and finance and infrastructure. Upholding the motto “YOUR PARTNER FOR INNOVATIVE CHALLENGES,” AMT offers clients practical solutions.

■ About Mirai Translate, Inc. https://miraitranslate.com/company/

Head office | 2F Shibuya Higashiguchi Building, 22-3 Shibuya 2-chome, Shibuya-ku, Tokyo

Representative | Daisuke Torii, President and Representative Director

Business activities | Pursuing a vision of “breaking down language barriers,” Mirai Translate Inc. has developed the AI automatic translation platforms FLaT and Mirai Translate Plus as ways to offer people around the globe the same experiences as native English speakers. We have provided organizations with more than 900,000 IDs. We are presently expanding our business as a language service platform that addresses a wide range of issues related to language communication and language through AI implementation.