The calculated distance (air line) between Nishi-Tokyo-shi and Kamifukuoka is approximately 10 miles respectively 17 kilometers.
By car or train, the actual journey to Kamifukuoka is certainly longer, as only the direct route (as the crow flies) between Nishi-Tokyo-shi and Kamifukuoka has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles