Kasagibaru Airstrip

The final closure was due to economic reasons. A post-war attempt to operate it as a private general aviation airstrip failed due to financial difficulties and a lack of sufficient demand. Its original use as a military base had ceased earlier with the end of World War II in August 1945.

The former airstrip site has been completely redeveloped and is now the location of the Kusu Mega Solar Power Plant (玖珠メガソーラー発電所), a large-scale photovoltaic power station. While the long, straight outline of the former runway is still discernible from satellite imagery, the entire area is now covered with thousands of solar panels.

The airstrip was originally constructed in 1944 as Kusu Airfield (玖珠飛行場) by the Imperial Japanese Army during World War II. Its primary purpose was to serve as a training base and a forward airfield for launching kamikaze special attack missions against Allied naval forces, particularly during the Battle of Okinawa. The base was home to units such as the Army's 212th Shinbu-tai (Special Attack Squadron). It was targeted and bombed by American aircraft in the spring of 1945. After the war, there was a brief and ultimately unsuccessful attempt in the 1960s to revive it as a private airstrip for light aircraft, pilot training, and sightseeing flights.

There are no known plans or prospects for reopening the site as an airport. The land has been fully and permanently repurposed for long-term renewable energy generation, making a return to aviation use virtually impossible.