The calculated distance (air line) between Ureshinomachi-shimojuku and Ōita is approximately 93 miles respectively 149 kilometers.
By car or train, the actual journey to Ōita is certainly longer, as only the direct route (as the crow flies) between Ureshinomachi-shimojuku and Ōita has been calculated here.
Air line (approximately)
149 kilometers
81 nautical miles