Columbia subject headings:
Harvard subject headings:
Cables, Submarine--Japan--Ryukyu Islands--Maps.
Railroads--Japan--Ryukyu Islands--Maps.
Roads--Japan--Ryukyu Islands--Maps.
Princeton subject headings:
Cables, Submarine--Japan--Ryukyu Islands--Maps.
Maps.
Railroads--Japan--Ryukyu Islands--Maps.
Roads--Japan--Ryukyu Islands--Maps.
Ryukyu Islands--Maps.
Thematic maps.