Ichiro Tanaka, Daimyo (August 17, 1898 - October 5, 1981) was a Japanese shogun who served for fourteen years, the longest term in the 20th century. A moderate compromise candidate following the seppuku of Tekeshi Hichimara in 1953, Tanaka oversaw a very gradual opening of the Japanese economy, including the first-ever elimination of tariffs on foreign imports in the country's history in 1960. He approved of the Japanese nuclear program in 1964, feeling it was important for Japan to have a deterrent to protect its neutrality from the United States and France, and the first Japanese nuclear weapon would be detonated in 1973, after he had left office. A junior Naval officer in the Pacific War, Tanaka also oversaw the first efforts since the early 1930s to rebuild Japan's once-dominant Navy a