Columbia subject headings:
Philosophers--Japan--Correspondence.
Yoshida, Shōin, 1830-1859--Correspondence.
Harvard subject headings:
Philosophers--Japan--Correspondence.
Yoshida, Shōin, 1830-1859--Correspondence.
Princeton subject headings:
Philosophers--Japan--Correspondence.
Yoshida, Shōin, 1830-1859--Correspondence.