The calculated distance (air line) between Kitakyushu and Fuchūchō is approximately 145 miles respectively 234 kilometers.
By car or train, the actual journey to Fuchūchō is certainly longer, as only the direct route (as the crow flies) between Kitakyushu and Fuchūchō has been calculated here.
Air line (approximately)
234 kilometers
126 nautical miles