Baron Ōtani Kikuzō (大谷 喜久蔵, Ōtani Kikuzō, 4 February 1856 – 26 November 1923) was a general in the Imperial Japanese Army. Otani participated in the First Sino-Japanese War, Russo-Japanese War, World War I and the Russian Civil War. During the course of the latter he commanded the Vladivostok Expeditionary Force and became the formal commander of the Allied Siberian Intervention. He was elevated to baron upon his retirement in 1920.