The calculated distance (air line) between Haibara-akanedai and Himeji is approximately 74 miles respectively 119 kilometers.
By car or train, the actual journey to Himeji is certainly longer, as only the direct route (as the crow flies) between Haibara-akanedai and Himeji has been calculated here.
Air line (approximately)
119 kilometers
64 nautical miles