Columbia subject headings:
Families--Economic aspects--Japan.
Marriage--Economic aspects--Japan.
Parenthood--Economic aspects--Japan.
Harvard subject headings:
Families--Economic aspects
Marriage--Economic aspects.
Parenthood--Economic aspects.
Quantitative research--Japan.
Princeton subject headings:
Families--Economic aspects.
Marriage--Economic aspects.
Parenthood--Economic aspects.
Quantitative research--Japan.