1713 Kokusai Chemical

Release Date: June 25, 2026 Statement Date: June 24, 2026 Statement Time: 11:47 Company Code: 1713 Company Name: Kokusai Chemical Subject: Announcement of Board Resolution to Reappoint Members of the Compensation Committee and Sustainability & Integrity Management Committee. Applicable Clause: Clause 6 Factual Date: June 24, 2026 Details: 1. Date of Change: 06/24/115 2. Functional Committee Names: Compensation Committee and Sustainability & Integrity Management Committee. 3. Former Members: Compensation Committee: Tseng Chi-Ying, Yeh Lien-Chu, Chi Wen-Kuei Sustainability & Integrity Management Committee: Hung Chih-Cheng, Chin Keng-Sheng, Hou Chih-Ming, Lin Hsin-Fa, Hsu Chin-Hua 4. Former Members' Background: (1) Compensation Committee Tseng Chi-Ying / Independent Director, Kuo Tai Chemical Factory (Inc.) Yeh Lien-Chu / Independent Director, Kuo Tai Chemical Factory (Inc.) Chi Wen-Kuei / Independent Director, Kuo Tai Chemical Factory (Inc.) (2) Sustainability & Integrity Management Committee Hung Chih-Cheng: Director & General Manager, Kuo Tai Chemical Factory (Inc.) Chin Keng-Sheng: Deputy General Manager, Kuo Tai Chemical Factory (Inc.) Hou Chih-Ming: Plant Manager, Kuo Tai Chemical Factory (Inc.) Lin Hsin-Fa: Deputy Plant Manager, Kuo Tai Chemical Factory (Inc.) Hsu Chin-Hua: Accounting Supervisor, Kuo Tai Chemical Factory (Inc.) 5. New Members: Compensation Committee: Tseng Chi-Ying, Yeh Lien-Chu, Chi Wen-Kuei Sustainability & Integrity Management Committee: Hung Chih-Cheng, Chin Keng-Sheng, Hou Chih-Ming, Lin Hsin-Fa, Hsu Chin-Hua 6. New Members' Background: (1) Compensation Committee Tseng Chi-Ying / Independent Director, Kuo Tai Chemical Factory (Inc.) Yeh Lien-Chu / Independent Director, Kuo Tai Chemical Factory (Inc.) Chi Wen-Kuei / Independent Director, Kuo Tai Chemical Factory (Inc.) (2) Sustainability & Integrity Management Committee Hung Chih-Cheng: Director & General Manager, Kuo Tai Chemical Factory (Inc.) Chin Keng-Sheng: Deputy General Manager, Kuo Tai Chemical Factory (Inc.) Hou Chih-Ming: Plant Manager, Kuo Tai Chemical Factory (Inc.) Lin Hsin-Fa: Deputy Plant Manager, Kuo Tai Chemical Factory (Inc.) Hsu Chin-Hua: Accounting Supervisor, Kuo Tai Chemical Factory (Inc.) 7. Nature of Change (please enter 'resignation', 'dismissal', 'end of term', 'death', or 'new appointment'): End of term. 8. Reason for Change: Full board renewal. 9. Previous Term (e.g., xx/xx/xx ~ xx/xx/xx): 06/21/112 ~ 06/20/115 10. Effective Date of New Appointment: 06/24/115 11. Other Matters to be Clarified: None.