The calculated distance (air line) between Kamojimachō-jōgejima and Fukuyama is approximately 63 miles respectively 102 kilometers.
By car or train, the actual journey to Fukuyama is certainly longer, as only the direct route (as the crow flies) between Kamojimachō-jōgejima and Fukuyama has been calculated here.
Air line (approximately)
102 kilometers
55 nautical miles