The calculated distance (air line) between Yanagawamachi-saiwaichō and Niigata is approximately 85 miles respectively 137 kilometers.
By car or train, the actual journey to Niigata is certainly longer, as only the direct route (as the crow flies) between Yanagawamachi-saiwaichō and Niigata has been calculated here.
Air line (approximately)
137 kilometers
74 nautical miles