Columbia subject headings:
Harvard subject headings:
Japan--Biography.
Japan--History--Restoration, 1853-1870--Biography.
Nagaoka, Kenkichi, 1834-1872.
Sakamoto, Ryōma, 1836-1867
Princeton subject headings:
Japan--Biography.
Japan--History--Restoration, 1853-1870--Biography.
Nagaoka, Kenkichi, 1834-1872.
Sakamoto, Ryōma, 1836-1867.