Columbia subject headings:
Harvard subject headings:
Gerontology--Sources.
Old age assistance--Japan--Sources.
Older people--Japan--Sources.
Older people--Services for--Sources.
Older people--Sources.
Princeton subject headings:
Gerontology--Sources.
Old age assistance--Japan--Sources.
Older people--Japan--Sources.
Older people--Services for--Sources.
Older people--Sources.