The calculated distance (air line) between Nishinomiya-hama and Izumiōtsu is approximately 15 miles respectively 25 kilometers.
By car or train, the actual journey to Izumiōtsu is certainly longer, as only the direct route (as the crow flies) between Nishinomiya-hama and Izumiōtsu has been calculated here.
Air line (approximately)
25 kilometers
13 nautical miles