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Obata Domain was originally created in 1590 as a 30,000 "koku" holding for Okudaira Nobumasa, a son-in-law of Tokugawa Ieyasu. After the Battle of Sekigahara in 1601, he was promoted to the 100,000 "koku" holding of Kanō in Mino province and Obata was reduced to 10,000 "koku" and given to Mizuno Tadakiyo, a son of Mizuno Tadashige. For his efforts at the Siege of Osaka, he was transferred to the 20,000 "koku" Kariya Domain in Mikawa Province in 1615. Nagai Naokatsu, another of Ieyasu’s generals noted for his actions ay the Siege of Osaka then briefly ruled from 1616-1617.