Kokan Airfield Fortifications

Three Japanese colonial era gun towers survive on the grounds of the former Kōkan Airfield (公館飛行場), originally known as Taichū Airfield (臺中飛行場) and later absorbed into Ching Chuan Kang Air Base (空軍清泉崗基地). The conical towers are of the same type as the lone gun tower at the eastern Taichū Airfield in Beitun. Built to defend the airbase from Allied bombing raids during World War 2, they are visible in American reconnaissance photography from July 1945. Three gun towers remain standing around what is now Taichung International Airport as of the mid-2020s but a World War 2 era water tower was demolished in 2011. Although not open to the public they can sometimes be see when the still-active military base has an open house event or during take-off and landing of passenger aircraft.