On February 23rd, 1904, Japan concluded the Japan-Korean Protocol enabling Japan to take military action in the Korea in spite of the fact that the Korean Empire had announced a 'Declaration of neutrality' prior to the outbreak of the war; This made the way for the conclusion of the Japan-Korea Treaty in August 1904 in which Japan assigned advisers to Korean financial and foreign affairs departments to ensure that they consulted the Japanese government prior to concluding treaties with foreign powers.
1904年2月23日、開戦前に「局外中立宣言」をした大韓帝国における軍事行動を可能にするために日韓議定書を締結し、開戦後8月には第一次日韓協約を締結、大韓帝国の財政、外交に顧問を置き条約締結に日本政府との協議をすることとした。