The calculated distance (air line) between Ōno-hara and Kitakyushu is approximately 86 miles respectively 139 kilometers.
By car or train, the actual journey to Kitakyushu is certainly longer, as only the direct route (as the crow flies) between Ōno-hara and Kitakyushu has been calculated here.
Air line (approximately)
139 kilometers
75 nautical miles