Iwakuni Kintaikyo Airport — Iwakuni, Japan

IWK is Iwakuni Kintaikyo Airport, located in Iwakuni, Yamaguchi Prefecture, Japan, sharing its runway with Marine Corps Air Station Iwakuni, a major U.S. and Japanese military installation. Civilian passenger service at IWK began in 2012, giving the area a domestic gateway to Tokyo alongside the base's ongoing military operations. Iwakuni is known for the historic Kintaikyo Bridge, a distinctive wooden arch bridge that lends the airport its name, and the surrounding region draws visitors interested in that landmark as well as nearby Hiroshima. IWK's dual civilian-military nature makes it somewhat unusual among Japanese airports, reflecting the long-standing U.S. military presence in this part of western Honshu.