The calculated distance (air line) between Yatsuomachi-higashikumisaka and Osaka is approximately 159 miles respectively 255 kilometers.
By car or train, the actual journey to Osaka is certainly longer, as only the direct route (as the crow flies) between Yatsuomachi-higashikumisaka and Osaka has been calculated here.
Air line (approximately)
255 kilometers
138 nautical miles