The calculated distance (air line) between Kodamachō-kodamaminami and Kawaguchi is approximately 42 miles respectively 67 kilometers.
By car or train, the actual journey to Kawaguchi is certainly longer, as only the direct route (as the crow flies) between Kodamachō-kodamaminami and Kawaguchi has been calculated here.
Air line (approximately)
67 kilometers
36 nautical miles