Surveys of imperial mausoleums by archaeologists are conducted under highly restricted conditions, and there are many graves, such as the Daisenryo Tumulus, about which it is doubtful whether or not they are truly graves of emperors or imperial family members.
考古学者の調査は厳しく制限されており大仙陵古墳のように実際に天皇あるいは皇族の墓であるか不明なものも多い。