Japan's AI Law Has No Penalties, Leans on AI事業者ガイドライン

Japan's choice of a penalty-free AI Law reflects a deliberate stance that detailed legal constraints could fail to keep pace with fast-moving technology and might hinder innovation. The law, formally titled the Act on Promotion of Research and Development and Utilization of Artificial Intelligence-Related Technologies, was enacted on May 28, 2025, promulgated on June 4, and fully enforced on September 1. Under this framework, the government investigates and analyzes cases where rights are infringed by inappropriate AI use, and based on the results, provides guidance, advice, and information to businesses under Article 16.

The soft-law layer is substantial. The AI事業者ガイドライン, jointly produced by the Ministry of Internal Affairs and Communications and the Ministry of Economy, Trade and Industry, divides AI-related businesses into three roles—AI developers, AI providers, and AI users—and lists ten common principles including human centricity, safety, fairness, privacy protection, security, transparency, accountability, education and literacy, fair competition, and innovation. Separately, the AI Appropriateness Guidelines, decided on December 19, 2025, under Article 13 of the AI Law, target not only businesses but also the national government, local governments, research institutions, and citizens, promoting voluntary efforts. The guidelines' four basic principles are a risk-based approach, active stakeholder engagement, end-to-end AI governance, and agile response. The government has said it will continue to study the ideal system design in light of AI risks and international trends in soft law and hard law.