Columbia subject headings:
Nihon Kokuyū Tetsudō--History.
Railroads--Japan--History--20th century.
Railroads--Japan--History--21st century.
Harvard subject headings:
Nihon Kokuyū Tetsudō--History.
Railroads--Japan--History--20th century.
Railroads--Japan--History--21st century.
Princeton subject headings:
Nihon Kokuyū Tetsudō--History.
Railroads--Japan--History--20th century.
Railroads--Japan--History--21st century.