
A Japan-South Korea ACSA Should Be Limited, Practical, and Politically Sustainable
by Ju Hyung Kim, published on 15 June 2026
Japan and South Korea do not have a military alliance akin to NATO. Nonetheless, a Japan-South Korea Acquisition and Cross-Servicing Agreement, or ACSA, would prove valuable in a period of crisis. It is most appropriate to understand ACSA as an agreement on logistics. It enables the two militaries to provide materials and services to one another in accordance with agreed conditions. Such support may include fuel, food, transportation, maintenance, medical support, communications support, repair services, and non-combatant assistance.