Notice Regarding Unauthorized Access to Systems at Taiwan Subsidiary

August 7,2026 Yonex Co., Ltd. (the “Company”) hereby announces that unauthorized access by a third party has been identified at YONEX TAIWAN CO., LTD. (優乃克股份有限公司; the “Subsidiary”), the Company’s subsidiary in Taiwan, as outlined below. The Company has taken necessary measures to prevent the spread of damage and is working with external experts to investigate the cause and scope of impact. The Com