[Ta Yih] Announcement of change in Vice President

1. Type of personnel change (please enter spokesperson, acting spokesperson, important operating officer (e.g. CEO, COO, CMO, CSO, etc.), financial officer, accounting officer, corporate governance officer, chief information security officer, research and development officer, chief internal auditor, or agent for litigious and non-litigious matters): Vice President 2. Date of occurrence of the change: 2026/04/21 3. Name, title, and resume of the previous holder: Hidetsugu Yamamoto, Vice President of the Company 4. Name, title, and resume of the new holder: None 5. Type of change (please enter "resignation", "position adjustment", "severance", "retirement", "death", "new appointment", or "dismissal"): Position adjustment 6. Reason for the change: Expiration of assignment term 7. Effective date: 2026/04/21 8. Other matters needing explanation: None