The calculated distance (air line) between Nishinomiya-hama and Ōmihachiman is approximately 52 miles respectively 84 kilometers.
By car or train, the actual journey to Ōmihachiman is certainly longer, as only the direct route (as the crow flies) between Nishinomiya-hama and Ōmihachiman has been calculated here.
Air line (approximately)
84 kilometers
45 nautical miles