The calculated distance (air line) between Nirasaki and Higashi-ōsaka is approximately 177 miles respectively 285 kilometers.
By car or train, the actual journey to Higashi-ōsaka is certainly longer, as only the direct route (as the crow flies) between Nirasaki and Higashi-ōsaka has been calculated here.
Air line (approximately)
285 kilometers
154 nautical miles