The calculated distance (air line) between Fukuoka and Maebaru-chūō is approximately 13 miles respectively 20 kilometers.
By car or train, the actual journey to Maebaru-chūō is certainly longer, as only the direct route (as the crow flies) between Fukuoka and Maebaru-chūō has been calculated here.
Air line (approximately)
20 kilometers
11 nautical miles