天津条约
In 1893, Komura was the chargé d'affaires at the Japanese legation in Beijing, in Qing dynasty China. In that position, he conveyed to the Chinese government Japan's intention of dispatching troops to Korea under the provisions of the Treaty of Tientsin to subdue the Tonghak Rebellion, which led to the First Sino-Japanese War. During the war, Komura was appointed as civilian administrator for territories Japan had captured in Manchuria. He was also a key figure in the negotiations to end the war, culminating in the Treaty of Shimonoseki, which he helped to draft.