Columbia subject headings:
Germans--Japan--Sources.
Japan--Foreign relations--Sources.
Siebold, Alexander, Freiherr von, 1846-1911--Correspondence.
Harvard subject headings:
Germans--Japan--Sources.
Japan--Foreign relations--Sources.
Siebold, Alexander, Freiherr von, 1846-1911--Correspondence.
Princeton subject headings:
Europe--Relations--Japan.
Japan--Relations--Europe.
Japanologists--Germany--Correspondence.
Siebold, Alexander, Freiherr von, 1846-1911--Correspondence.