Columbia subject headings:
Harvard subject headings:
Communication in politics--Japan--History--17th century.
Communication in politics--Japan--History--18th century.
Communication in politics--Japan--History--19th century.
Communication in politics--Japan--History.
Shipping--Japan--Inland Sea--History--17th century.
Shipping--Japan--Inland Sea--History--18th century.
Shipping--Japan--Inland Sea--History--19th century.
Shipping--Japan--Inland Sea--History.
Transportation--Japan--History
Princeton subject headings:
Communication in politics--Japan--History.
Shipping--Japan--Inland Sea--History.
Transportation--Japan--History.