Columbia subject headings:
Harvard subject headings:
Japan--History--To 1185.
Names, Geographical--Japan
Names, Geographical--Japan--Hokkaido
Names, Geographical--Japan--Tōhoku Region.
Princeton subject headings:
Hokkaido (Japan)--History--To 1185.
Japan--History--To 1185.
Names, Geographical--Japan.
Tōhoku Region (Japan)--History--To 1185.