The calculated distance (air line) between Kamojimachō-jōgejima and Kurashiki is approximately 49 miles respectively 78 kilometers.
By car or train, the actual journey to Kurashiki is certainly longer, as only the direct route (as the crow flies) between Kamojimachō-jōgejima and Kurashiki has been calculated here.
Air line (approximately)
78 kilometers
42 nautical miles