Columbia subject headings:
Emperors--Japan--History--19th century.
Emperors--Japan--History--20th century.
Emperors--Japan--History--21st century.
Japan--Politics and government--1868-
Royal houses--Japan--History--19th century.
Royal houses--Japan--History--20th century.
Royal houses--Japan--History--21st century.
Harvard subject headings:
Emperors--Japan--History
Japan--Politics and government--1868-
Royal houses--Japan--History.
Princeton subject headings:
Emperors--Japan--History.
Japan--Politics and government--1868-
Royal houses--Japan--History.