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Eitaro Mabuchi (馬淵 鋭太郎, Mabuchi Eitarō, 1867 – September 13, 1943) was a Japanese politician who served as governor of Yamagata Prefecture (1906-1912), Yamaguchi Prefecture (1914-1916), Mie Prefecture (1914-1916), Hiroshima Prefecture from April 1916 to May 1918, Kyoto Prefecture (1918-1921) and mayor of Kyoto (1921–1924).

Preceded byTanaka Takamichi Governor of Yamagata Prefecture 1906-1912 Succeeded byIwataro Odakiri Preceded by Governor of Yamaguchi Prefecture 1912-1914 Succeeded by Preceded byMagoichi Tahara Governor of Mie Prefecture 1914-1916 Succeeded byShujiro Nagata Preceded byTerada Yushi Governor of Hiroshima Prefecture 1916–1918 Succeeded byYasukouchi Asakichi Preceded byKiuchi Jūshirō Governor of Kyoto Prefecture 1918-1921 Succeeded byRaizo Wakabayashi