The calculated distance (air line) between Tanushimarumachi-toyoki and Kitakyushu is approximately 36 miles respectively 58 kilometers.
By car or train, the actual journey to Kitakyushu is certainly longer, as only the direct route (as the crow flies) between Tanushimarumachi-toyoki and Kitakyushu has been calculated here.
Air line (approximately)
58 kilometers
31 nautical miles