The calculated distance (air line) between Tatsunochō-tominaga and Hamamatsu is approximately 181 miles respectively 291 kilometers.
By car or train, the actual journey to Hamamatsu is certainly longer, as only the direct route (as the crow flies) between Tatsunochō-tominaga and Hamamatsu has been calculated here.
Air line (approximately)
291 kilometers
157 nautical miles