小浜藩
was "daimyō" of the Fukaya Domain and then the Kawagoe Domain, before becoming the 1st Sakai "daimyō" of the Obama Domain. He was the son of Sakai Tadatoshi, a hereditary retainer of Tokugawa Ieyasu. He served Tokugawa Hidetada during the Siege of Ueda and later served Shōgun Tokugawa Iemitsu, who promoted him to "rōjū" in 1624. In 1634, he was transferred to Obama and completed the construction of Obama Castle. He retired from public life in 1656 and died in 1662. His grave is at the clan temple of Kuin-ji in Obama.