Columbia subject headings:
Akihito, Emperor Emeritus of Japan, 1933-
Emperors--Succession--Japan--History--21st century.
Harvard subject headings:
Akihito, Emperor Emeritus of Japan, 1933-
Emperors--Japan
Emperors--Succession--Japan--History--21st century.
Princeton subject headings:
Akihito, Emperor Emeritus of Japan, 1933-
Emperors--Japan.