The Japan Fair Trade Commission (JFTC) has initiated an investigation into Microsoft Corporation for potential violations of Japan's Antimonopoly Act. This action, announced on March 4, 2026, indicates a substantive regulatory review of Microsoft's business practices within Japan. The JFTC is actively soliciting input from third parties, suggesting a broad scope of inquiry into the alleged anti-competitive conduct.

Regulated entities, particularly those in the technology sector operating in Japan, should be aware of this investigation. While specific compliance actions are not yet mandated, companies may be asked to provide information or comments. The JFTC's investigation implies potential future enforcement actions or policy changes related to antitrust concerns in the technology market. Companies should monitor JFTC announcements for further developments and assess their own practices for compliance with antitrust regulations.