Center for Juris-Informatics

AI Jurisprudence in Support of an AI-Driven Society

With the rapid development of generative AI, legal systems, the judiciary, and corporate activity are entering a major turning point. The Center for Juris-Informatics (CJI), established at ROIS, advances research from two perspectives: “applying AI to law (Law by AI)” and “regulating AI through law (Law of AI).” Alongside developing legal frameworks that ensure the transparency and accountability of AI, the Center works to develop neuro-symbolic AI that achieves reliable legal reasoning, aiming to establish a new academic field that fuses information technology and law, and to cultivate the next generation of legal professionals and researchers.

Toward Trustworthy Legal AI Fusing Generative AI and Logical Reasoning

While today’s generative AI has a high capacity for generating text, challenges remain in terms of legal accuracy, explainability, and logical consistency. CJI researches neuro-symbolic AI that combines large language models with logic programming, legal reasoning, and argumentation theory, aiming to realize a system that can consistently handle everything from understanding legal documents, to knowledge extraction, machine-readable rule formation, legal reasoning, and explanation of results. Rather than simply generating natural-sounding legal text, the focus of this research is building highly reliable legal AI that can explain its reasoning and collaborate with people through repeated revision and improvement.

Building New Legal Systems and Rules of Responsibility for the AI Era

As the social implementation of AI advances, problems that existing legal systems alone find difficult to address — such as accidents involving autonomous vehicles or the improper use of personal information — are increasing. When an accident or dispute occurs, it must be made clear who bears responsibility: the manufacturer, the AI developer, or the user. This requires transparency and accountability that make it possible to record and trace AI’s decision-making processes and its history of data use. Through research on “Law of AI,” the Center examines what legal systems and governance are needed to support the safe and reliable use of AI, and advances research that supports social implementation from both the technological and legal sides.