The calculated distance (air line) between Sano and Ōmamachō-ōmama is approximately 19 miles respectively 30 kilometers.
By car or train, the actual journey to Ōmamachō-ōmama is certainly longer, as only the direct route (as the crow flies) between Sano and Ōmamachō-ōmama has been calculated here.
Air line (approximately)
30 kilometers
16 nautical miles