The calculated distance (air line) between Kamogatachō-kamogata and Okayama is approximately 21 miles respectively 34 kilometers.
By car or train, the actual journey to Okayama is certainly longer, as only the direct route (as the crow flies) between Kamogatachō-kamogata and Okayama has been calculated here.
Air line (approximately)
34 kilometers
18 nautical miles