The calculated distance (air line) between Yanagawamachi-saiwaichō and Aihara is approximately 171 miles respectively 275 kilometers.
By car or train, the actual journey to Aihara is certainly longer, as only the direct route (as the crow flies) between Yanagawamachi-saiwaichō and Aihara has been calculated here.
Air line (approximately)
275 kilometers
148 nautical miles