The calculated distance (air line) between Kitakata and Niitsu-honchō is approximately 42 miles respectively 68 kilometers.
By car or train, the actual journey to Niitsu-honchō is certainly longer, as only the direct route (as the crow flies) between Kitakata and Niitsu-honchō has been calculated here.
Air line (approximately)
68 kilometers
36 nautical miles