Kadena Air Base (嘉手納飛行場, Kadena Hikōjō) (ICAO: RODN) is a United States Air Force base in the towns of Kadena and Chatan and the city of Okinawa, in Okinawa Prefecture, Japan. It is often referred to as the "Keystone of the Pacific". Kadena Air Base is home to the USAF's 18th Wing, the 353rd Special Operations Group, reconnaissance units, 1st Battalion, 1st Air Defense Artillery Regiment, and a variety of associated units. Over 20,000 American servicemembers, family members, and Japanese employees live or work aboard Kadena Air Base. It is the largest and most active US Air Force base in East Asia.