Columbia subject headings:
Castles--Japan--Maps.
Castles--Japan.
Fortification--Japan--Maps.
Fortification--Japan.
Japan--History--1185-1600.
Maps.
Harvard subject headings:
Castles--Japan
Castles--Japan--Maps.
Fortification--Japan
Fortification--Japan--Maps.
Japan--History--1185-1600.
Princeton subject headings:
Castles--Japan--History.
Castles--Japan--Periodicals.
Fortification--Japan--History.
Fortification--Japan--Periodicals.
Japan--Antiquities--Periodicals.
Periodicals.