日清・日露戦争の勝利からアジア・太平洋戦争の敗北前夜にいたる帝国日本の経済外交とアフリカ植民地に対する経済戦略を考察し、第二次世界大戦後の日本の国際関係における独立アフリカの位置づけを展望する。両大戦間期と戦後の世界経済史研究に新たな地平を開く。 It considers Pre-war Imperial Japan’s economic diplomacy to Colonial Africa from the victory of Sino-Japanese and Russo-Japanese Wars to the Eve of defeat in Asia-Pacific War and gives a view on the position of Independent Africa in the Post- war Japan’s International Relations. It argues that the history of Japan-Africa relations was part of Japanese history and part of African history as well and the Study of both history will extend our understanding of the World history as related with each other and simultaneously progressing in parallel.