Columbia subject headings:
Harvard subject headings:
Sakamoto, Ryōma, 1836-1867
Sakamoto, Ryōma, 1836-1867--Correspondence.
Statesmen--Japan--Biography.
Princeton subject headings:
Sakamoto, Ryōma, 1836-1867--Correspondence.
Sakamoto, Ryōma, 1836-1867.
Statesmen--Japan--Biography.