This book constitutes the refereed proceedings of the 18th JSAI International Symposium on Artificial Intelligence, JSAI-isAI 2026, held in Gunma, Japan, during June 79, 2026.

The 15 full papers were included in this were carefully reviewed and selected from 46 submissions. They focus on models of legal reasoning, computerized legal education, AI legal problems, use and exploration, the vast business and AI technology fields.

Inhalt

.- JURISIN 2026.
.- Twentieth International Workshop on Juris-informatics (JURISIN 2026).

.- An Empirical Study of Structural Rewards in Reinforcement Learning for Legal Summarization.
.- Resolving Definitional Ambiguity in Legal Language: A Logical Approach to Consistent Judicial Outcomes.
.- Teaching AI to contextualize the Law: AI-generated definitions from UK statutes and case law.
.- Systematising Knowledge Representation Challenges for Compliant Autonomous Agents.
.- Reducing Administrative Burden by Automating the Translation of Administrative Law into Digital Twins of Legislation.
.- Privacy Enhancing Technologies in the EU Digital Omnibus Proposal: Clarifying the Role of PETs in the Definition of Personal Data under the GDPR.
.- Mapping Legal Propositions in the U.S. Supreme Court Party Briefs: A Human-In-The-Loop Approach.
.- Improving Reliability in Multimodal Legal Interpretation of Traffic Signs.

.- SCIDOCA 2026.
.- Tenth International Workshop on Scientific Document Analysis (SCIDOCA 2026).

.- Journal-Level Citation Impact of Articles with Dataset Links in Abstracts Identified Using a Generative AI Ensemble.
.- VietPS-Hallu: A Vietnamese Dataset for Hallucination Detection in Large Language Models within the Public Services.

.- AI-Biz 2026.
.- Artificial Intelligence of and for Business (AI-Biz 2026).

.- Using Bayesian Modeling for Forecasting Resource Demand in Construction Projects on Planning Phase.
.- Holonomic Information Management: A Sheaf-Theoretic Navigation and Computational Experiment on Arrovian Possibility.
.- Tail-Risk Assessment and Scenario-Rule Extraction in an Agent-Based Tsunami Evacuation Simulation with Stochastic Road Blockages: A Coastal Urban District Case Study in Japan.
.- Effects of Spatial Configuration and Environmental Factors on Route Choice Behavior during Urban Strolling in Commercial Districts.
.- Forecasting Residential Gas Demand in an Aging Regional City Using a Hybrid Microsimulation Model.