The calculated distance (air line) between Shizuoka and Minamiuonuma is approximately 148 miles respectively 238 kilometers.
By car or train, the actual journey to Minamiuonuma is certainly longer, as only the direct route (as the crow flies) between Shizuoka and Minamiuonuma has been calculated here.
Air line (approximately)
238 kilometers
128 nautical miles