Columbia subject headings:
Japan--Rural conditions--1945-
Rural-urban migration--Japan--History--20th century.
Rural-urban migration--Japan--History--21st century.
Sparsely populated areas--Japan--History--20th century.
Sparsely populated areas--Japan--History--21st century.
Harvard subject headings:
Japan--Rural conditions.
Rural-urban migration--Japan.
Sparsely populated areas--Japan.
Princeton subject headings: