Columbia subject headings:
Fisheries--Japan--Hokkaido--History--17th century.
Fisheries--Japan--Hokkaido--History--18th century.
Fisheries--Japan--Hokkaido--History--19th century.
Fishery products--Japan--Hokkaido--History--17th century.
Fishery products--Japan--Hokkaido--History--18th century.
Fishery products--Japan--Hokkaido--History--19th century.
Harvard subject headings:
Fisheries--Japan--Hokkaido--History.
Fishery products--Japan--Hokkaido--History.
Princeton subject headings:
Fisheries--Japan--Hokkaido--History.
Fishery products--Japan--Hokkaido--History.