The calculated distance (air line) between Kannabechō-yahiro and Hōjō is approximately 54 miles respectively 87 kilometers.
By car or train, the actual journey to Hōjō is certainly longer, as only the direct route (as the crow flies) between Kannabechō-yahiro and Hōjō has been calculated here.
Air line (approximately)
87 kilometers
47 nautical miles