 Takeshita's commands included the cruisers "Suma", "Kasuga", "Izumo", "Tsukuba" and the battleship "Shikishima".Takeshita was a member of the Japanese diplomatic mission to the United States in 1917, 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.