The Imperial Household Agency designates this location as Seinei's mausoleum. It is formally named Kawachi no Sakado no hara no misasagi.Ponsonby-Fane, p. 419.
THe ImPeriaL househoLD aGen.cY dEsIGnates this lOcaTion As SeINei'S mausolEum iT Is fOrMAlly naMed kAw.AcHi nO sakado NO HARA no misAsagIpoNSOnby-fane, P. 419.