Notice Regarding Material Weakness in Internal Control Over Financial Reporting

June 24, 2026 Company Name: MUSCAT GROUP Inc. Representative: Ryo Okubo, Representative Director Inquiries: Yuhei Morioka, Director and (Telephone: +81-3-6684-2373) Notice Regarding Material Weakness in Internal Control Over Financial Reporting MUSCAT GROUP Inc. hereby announces that, in the Internal Control Report for the 10th fiscal year (fiscal year ended March 31, 2026) submitted to the Kanto