This mausoleum is generally supposed to have been constructed as one of the last keyhole-shaped mounds judging from the fact that it does not furnish Haniwa (unglazed terra-cotta cylinders and hollow sculptures arranged on and around the mounded tombs (kofun)), although no detailed investigation has been carried out because this is just a referable mausoleum.
陵墓参考地のために詳細な調査がなされておらず不明確な点があるものの、埴輪の存在が明らかでないなどの特徴から、前方後円墳終末期のものであるとの説が強い。