Columbia subject headings:
Mitsubishi Zaibatsu--History.
Nihon Yūsen Kabushiki Kaisha--History.
Harvard subject headings:
Mitsubishi Zaibatsu--History.
Nihon Yūsen Kabushiki Kaisha--History.
Shipping--Japan--History
Princeton subject headings:
Mitsubishi Zaibatsu--History.
Nihon Yūsen Kabushiki Kaisha--History.