Eugen Ott (8 April 1889 – 22 January 1977) was the German ambassador to Japan during the early years of World War II, he is most famously known for having worked with Soviet spy Richard Sorge. During World War I, Ott served with distinction on the eastern front as an officer with the 26th (Württemberg) Infantry Division. His commander was General Wilhelm von Urach, who was elected king of Lithuania in 1918 as Mindaugas II of Lithuania. Prior to Adolf Hitler coming to power in Germany (1933), Ott had been the adjutant of General Kurt von Schleicher.