Columbia subject headings:
Childbirth--Japan--History--18th century.
Childbirth--Japan--History--19th century.
Childbirth--Japan--History--20th century.
Japan--Population--History--18th century.
Japan--Population--History--19th century.
Japan--Population--History--20th century.
Harvard subject headings:
Childbirth--Japan.
Japan--Population.
Princeton subject headings:
Childbirth--Japan.
Japan--Population.