Columbia subject headings:
Agriculture--Japan--Yamaguchi-ken--History--19th century.
Agriculture--Japan--Yamaguchi-ken--History--20th century.
Rice trade--Government policy--Japan--Yamaguchi-ken--History--19th century.
Rice trade--Government policy--Japan--Yamaguchi-ken--History--20th century.
Harvard subject headings:
Agriculture--Japan--Yamaguchi-ken--History.
Rice trade--Government policy--Japan--Yamaguchi-ken--History.
Princeton subject headings:
Agriculture--Japan--Yamaguchi-ken--History.
Rice trade--Government policy--Japan--Yamaguchi-ken--History.