The calculated distance (air line) between Okayama and Yamazakichō-nakabirose is approximately 43 miles respectively 68 kilometers.
By car or train, the actual journey to Yamazakichō-nakabirose is certainly longer, as only the direct route (as the crow flies) between Okayama and Yamazakichō-nakabirose has been calculated here.
Air line (approximately)
68 kilometers
37 nautical miles