The Isshiki-Tsuchiya clan served the Takeda clan, the guard of Kai-no-kuni, during the Sengoku period, and after the downfall of the Takeda clan Tadanao TSUCHIYA was employed by Ieyasu TOKUGAWA to become the lord of the domain of Kururi, Kazusa-no-kuni.
戦国時代、甲斐国守護武田氏に仕えていた一色土屋氏は武田氏滅亡後、土屋忠直が徳川家康に召出されて上総国久留里藩主となる。