Columbia subject headings:
Harvard subject headings:
Diplomats--Japan--Correspondence.
Diplomats--Japan--Diaries.
Ijūin, Hikokichi, 1863 or 1864-1924--Correspondence.
Ijūin, Hikokichi, 1863 or 1864-1924--Diaires.
Japan--Foreign relations--1868-
Princeton subject headings:
Diplomats--Japan--Correspondence.
Diplomats--Japan--Diaries.
Ijūin, Hikokichi, 1863 or 1864-1924--Correspondence.
Ijūin, Hikokichi, 1863 or 1864-1924--Diaries.
Japan--Foreign relations--1868-