Yokosuka Domain
In February 1601, Ōsuga Tadamasa, lord of Kururi Domain in Kazusa Province, was allowed by Tokugawa Ieyasu to return to his ancestral estates in Tōtōmi, and was granted the status of a 55,000 "koku" "daimyō". Ōsuga Tadamasa was the son of the Castellan of Yokosuka Castle and had been relocated by Toyotomi Hideyoshi along with Ieyasu to the Kantō region. During the unsettled period following Hideyoshi’s death, Ōsuga Tadamasa developed a reputation for his upright leadership, and was a strong supporter of Ieyasu. However, his son succeeded to Tatebayashi Domain (110,000 "koku") in Kōzuke Province, and Yokosuka Domain reverted to "tenryō" status in December 1615.