The 673rd Mission Support Group (673 MSG) is a unit under the Pacific Air Forces (PACAF) of the United States Air Force. This group, headquartered at Yokota Air Base in Japan, is primarily responsible for providing mission support services to assigned and attached units within PACAF. These services include but are not limited to civil engineering, communications, logistics, security forces, and personnel services. The 673 MSG contributes significantly to the readiness and effectiveness of U.S. Air Force operations across the Asia-Pacific region.