Columbia subject headings:
Conference papers and proceedings.
Navigation--Japan--Shikoku Region--History--Congresses.
Shikoku Region (Japan)--History--Congresses.
Shipbuilding--Japan--Shikoku Region--History--Congresses.
Harvard subject headings:
Navigation--Japan--Shikoku Region--History.
Shipbuilding--Japan--Shikoku Region--History.
Ships--Japan--Shikoku Region--History.
Princeton subject headings:
Navigation--Japan--Shikoku Region--History.
Shipbuilding--Japan--Shikoku Region--History.
Ships--Japan--Shikoku Region--History.