Columbia subject headings:
Emperors--Japan--History--Handbooks, manuals, etc.
Handbooks and manuals.
Royal houses--Japan--Handbooks, manuals, etc.
Harvard subject headings:
Emperors--Japan--History--Handbooks, manuals, etc.
Handbooks and manuals
Royal households--Japan--Dictionaries--Japanese.
Royal houses--Japan--Handbooks, manuals, etc.
Princeton subject headings:
Royal households--Japan--Dictionaries--Japanese.