Columbia subject headings:
Harvard subject headings:
Merchant marine--History--Chronology.
Merchant marine--Japan--History--Chronology.
Shipping--History--Chronology.
Shipping--Japan--History--Chronology.
Princeton subject headings:
Merchant marine--History--Chronology.
Merchant marine--Japan--History--Chronology.
Shipping--History--Chronology.
Shipping--Japan--History--Chronology.