# U.S. Marines Deploy Missile Systems on Yonaguni

The U.S. Marine Corps plans to deploy NMESIS anti-ship and MADIS air-defense systems to Yonaguni, Japan, for the Keen Sword exercise scheduled for October 19–29, 2026. The exercise will emphasize distributed, land-based operations across Japan’s southwestern islands and include U.S. and Japanese missile systems. For contractors, this is a potential demand signal for mobile defense, sustainment, transport, and communications capabilities—not an announced solicitation or contract award.

- Companies with relevant mobile-defense or exercise-support capabilities can assess how their offerings apply to distributed operations across remote islands; the signal does not identify a specific procurement opportunity.
- The exercise begins October 19, 2026, 13 days from the current date. No proposal deadline or contracting action is specified.

**Jurisdictions:** international
**Industries:** Defense & Military
**Published:** October 05, 2026

### Government Entities
- U.S. Marine Corps (USMC)
- Japan Ministry of Defense (MOD)

### Sources
- [US Marine Corps anti-ship weaponry to see exercise action on remote Japan island near Taiwan](https://www.defensenews.com/global/asia-pacific/2026/10/05/us-marine-corps-anti-ship-weaponry-to-see-exercise-action-on-remote-japan-island-near-taiwan) - Defense News