The calculated distance (air line) between Kodamachō-kodamaminami and Niigata is approximately 118 miles respectively 190 kilometers.
By car or train, the actual journey to Niigata is certainly longer, as only the direct route (as the crow flies) between Kodamachō-kodamaminami and Niigata has been calculated here.
Air line (approximately)
190 kilometers
102 nautical miles