The calculated distance (air line) between Yamazakichō-nakabirose and Kawanishi is approximately 51 miles respectively 82 kilometers.
By car or train, the actual journey to Kawanishi is certainly longer, as only the direct route (as the crow flies) between Yamazakichō-nakabirose and Kawanishi has been calculated here.
Air line (approximately)
82 kilometers
44 nautical miles