Columbia subject headings:
Election districts--Japan--History--20th century.
Election districts--Japan--History--21st century.
Election districts--Japan.
Elections--Japan--History--20th century.
Elections--Japan--History--21st century.
Elections--Japan.
Political parties--Japan--History--20th century.
Political parties--Japan--History--21st century.
Harvard subject headings:
Election districts--Japan.
Elections--Japan
Princeton subject headings: