日露戦争以降の日本外交と日米関係 : 満蒙権益の拡大と門戸開放主義の角逐

Taking Teramoto sensei’s works as a guide, this paper examines how Foreign Ministers Jutaro Komura and Hayashi Tadasu sought to secure and expand Japan’s interests in South Manchuria, which they had gained in the Russo-Japanese War, based on their perceptions and policies of the Open Door Policy.
In 1905, Japan won the Russo-Japanese War and gained Manchurian Interests. This was just after the U.S. issued a declaration of the Open Door Policy of the Qing Empire. Japan succeeded in bringing the Russo-Japanese War to an advantageous conclusion with the support of the U.S. Therefore, to maintain the US-Japan relations, Japan was forced to observe the Open Door Policy of the Qing Empire while the expansion of its interests in Manchuria. How did Japan manage to both potentially contradictory diplomatic policies? To answer this question, this paper analyzed the perceptions and operational policies of the Open Door Policy of Foreign Ministers Komura and Hayashi, who led Japan's diplomacy after the Russo-Japanese War.
As a result, it became clear that both Foreign Ministers supposed that if the principle of equal opportunity was maintained, the relationship with the U.S. could be maintained even if the administrative preservation was virtually nullified and that the U.S. accepted Japan's such a policy to a certain extent.