The calculated distance (air line) between Suga-inadazutsumi and Itabashi is approximately 13 miles respectively 20 kilometers.
By car or train, the actual journey to Itabashi is certainly longer, as only the direct route (as the crow flies) between Suga-inadazutsumi and Itabashi has been calculated here.
Air line (approximately)
20 kilometers
11 nautical miles