[2] In this role, Takeshita was an active participant in negotiations mediated by President Theodore Roosevelt that led to the Treaty of Portsmouth, ending the Russo-Japanese War.

[3] Takeshita's commands included the cruisers Suma, Kasuga, Izumo, Tsukuba and the battleship Shikishima.

[2] Takeshita was a member of the Japanese diplomatic mission to the United States in 1917,[4] the Paris Peace Conference of 1919, and the League of Nations.

In these positions, he played a leading role in Japan's obtaining former German holdings in the Central and Western Pacific.

[1] Takeshita returned to Japan to accept a posting as commander-in-chief of the Combined Fleet on 1 December 1922, a position he held until January 1924.

[7] His mission was to try to explain to American audiences that Japan's invasion of China in the Second Sino-Japanese War, was to stop the spread of Communism.

This recommendation caused Yamamoto to invite Ueshiba to Tokyo to provide demonstrations to the Japanese military and political elite.

[16] Takeshita's influence was such that many military officers, government officials and members of the wealthy class began practicing Ueshiba's martial art.

[18] In 1940, Takeshita was instrumental in providing a legal identity to Ueshiba's Kobukan organization by founding the Kobukai Foundation and becoming its first president.