The calculated distance (air line) between Shizuoka and Higashi-ōsaka is approximately 160 miles respectively 258 kilometers.
By car or train, the actual journey to Higashi-ōsaka is certainly longer, as only the direct route (as the crow flies) between Shizuoka and Higashi-ōsaka has been calculated here.
Air line (approximately)
258 kilometers
139 nautical miles