Exercise Keen Sword (KS) is a biennial, Chairman of the Joint Chiefs of Staff-directed, U.S. Indo-Pacific Command-scheduled, and U.S. Pacific Fleet-sponsored field training exercise (FTX). KS is a joint/bilateral FTX involving U.S. military and Japan Self-Defense Force (JSDF) personnel in the vicinity of Japan. This exercise is designed to enhance Japan-U.S. combat readiness and interoperability while strengthening bilateral relationships and demonstrating U.S. resolve to support the security interests of allies and partners in the region.