Columbia subject headings:
Japan--History--To 645.
Ōjin, Emperor of Japan, active 3rd century-4th century.
Harvard subject headings:
Japan--History--To 645
Ōjin, Emperor of Japan, active 3rd century-4th century.
Princeton subject headings:
Japan--History--To 645.
Ōjin, Emperor of Japan, active 3rd century-4th century.