Columbia subject headings:
Industrial relations--Japan--History--20th century.
Labor unions--Japan--History--20th century.
Working class--Political activity--Japan--History--20th century.
Harvard subject headings:
Industrial relations--Japan--History--20th century.
Labor unions--Japan--History--20th century.
Working class--Political activity--Japan--History--20th century.
Princeton subject headings:
Industrial relations--Japan--History--20th century.
Labor unions--Japan--History--20th century.
Working class--Political activity--Japan--History--20th century.