The calculated distance (air line) between Funaishikawa and Utsunomiya is approximately 39 miles respectively 62 kilometers.
By car or train, the actual journey to Utsunomiya is certainly longer, as only the direct route (as the crow flies) between Funaishikawa and Utsunomiya has been calculated here.
Air line (approximately)
62 kilometers
33 nautical miles