The calculated distance (air line) between Yanagawamachi-saiwaichō and Saitama is approximately 144 miles respectively 232 kilometers.
By car or train, the actual journey to Saitama is certainly longer, as only the direct route (as the crow flies) between Yanagawamachi-saiwaichō and Saitama has been calculated here.
Air line (approximately)
232 kilometers
125 nautical miles