The calculated distance (air line) between Tatsunochō-tominaga and Hiroshima is approximately 124 miles respectively 199 kilometers.
By car or train, the actual journey to Hiroshima is certainly longer, as only the direct route (as the crow flies) between Tatsunochō-tominaga and Hiroshima has been calculated here.
Air line (approximately)
199 kilometers
107 nautical miles