Columbia subject headings:
Aging--Social aspects--Japan--History--21st century--Periodicals.
Japan--Social conditions--21st century--Statistics--Periodicals.
Harvard subject headings:
Aging--Social aspects--Japan--Periodicals.
Japan--Social conditions--Statistics--Periodicals.
Princeton subject headings:
Aging--Social aspects--Japan--History--21st century--Periodicals.
Japan--Social conditions--21st century--Statistics--Periodicals.
Periodicals.
Statistics.