Over the postwar period Japanese scholars have pressured the Imperial House
hold Agency for greater access to sites under its control as tombs associat
ed with the imperial line, arguing they are cultural properties vital to un
derstanding ancient Japanese history. The agency has responded by making in
formation about the sites more generally available, and by permitting limit
ed numbers of scholars to inspect excavations it conducts prior to repairin
g the tombs. But it maintains that since the sites are above all graves whe
re rites are performed for ancestors of the imperial household. their treat
ment is not a scientific but a religious matter.