The Second edition of the New Palgrave Dictrionary of economics
(online) has entries on the history of economic thought in Japan,
China and Korea. Not Africa or SE Asia, but closer than Europe. There
are also chapters in the HOPE (1997) supplement on the
Internationalization of economics edited by Bob Coats. Others will, I
am sure, provide references to Islamic economics on which much has
been written.
Roger Backhouse