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