The calculated distance (air line) between Kanzakimachi-kanzaki and Kitakyushu is approximately 46 miles respectively 75 kilometers.
By car or train, the actual journey to Kitakyushu is certainly longer, as only the direct route (as the crow flies) between Kanzakimachi-kanzaki and Kitakyushu has been calculated here.
Air line (approximately)
75 kilometers
40 nautical miles