Columbia subject headings:
Harvard subject headings:
Japan--Emigration and immigration--Government policy.
Koreans--Legal status, laws, etc.--Japan
Smuggling--Japan--History--20th century.
Princeton subject headings:
Japan--Emigration and immigration--Government policy--History--20th century.
Japan--Emigration and immigration--Government policy.
Koreans--Legal status, laws, etc.--Japan--History--20th century.
Koreans--Legal status, laws, etc.--Japan.
Smuggling--Japan--History--20th century.