In the Medieval Ages, the mausoleum on the mountain was devastated and the records about it handed down until then lost and therefore, the search for the mausoleum during the Genroku Era produced many opinions including one asserting that the Suisenzuka tumulus (a tumulus which is a large keyhole-shaped tomb mound and is 55 meters long) in Jimyoji-cho was the mausoleum and, later on, the above mausoleum was presumed to be the actual one.
中世には山陵が荒廃して所伝を失い、元禄時代の探陵に諸説生じ慈明寺町のスイセン塚古墳（前方後円墳、墳丘長55m）があてられたりした。