Ōta Sukemoto (太田 資始, August 28, 1799 – June 20, 1867) was the 5th daimyō of Kakegawa Domain in Tōtōmi Province, (modern-day Shizuoka Prefecture) in late-Edo period and Bakumatsu period Japan and a high-level office holder within the Tokugawa shogunate,[1] and ninth hereditary chieftain of the Kakegawa-Ōta clan.
[1] On May 6, 1837, he became a rōjū, in which position he often clashed with senior rōjū Mizuno Tadakuni over the provisions of the unpopular Tenpō Reforms, especially the Agechi-rei which was to have daimyō in the vicinity of Edo and Ōsaka surrender their holdings for equal amounts of land elsewhere, thereby consolidating Tokugawa control over these strategically vital areas.
[2] On his forced retirement, Sukemoto turned Kakegawa domain over to his eldest son Ōta Sukekatsu.
However upon Ienari's death, he returned to serve as rōjū again from June 23, 1858, through July 23, 1859, together with Matsudaira Noriyasu and Manabe Akikatsu.
He died on June 20, 1867, and his grave is at the Ōta clan bodaiji of Myōhokke-ji in Mishima, Shizuoka.