Apart from these graves, the Imperial Household Agency currently manages various other properties, including quasi-mausoleums (such as cinerariums, cremation mounds and ash mounds), memorial pagodas used to bury hair, teeth and nails, and potential mausoleums with unidentified owners that have the possibility of being imperial family members' graves, and all these properties are collectively called mausoleums.
これらのほか、宮内庁が現在管理しているものには、分骨所・火葬塚・灰塚など陵に準じるもの、髪・歯・爪などを納めた髪歯爪塔などの一種の供養塔、被葬者を確定できないものの皇族の墓所の可能性が考えられる陵墓参考地、などがあり、一般にはこれらを総称して陵墓（りょうぼ）という。