水野氏
was a feudal domain under the Tokugawa shogunate of the Edo period, located in Kazusa Province (modern-day Chiba Prefecture), Japan. It was centered on Tsurumaki "jin'ya" in what is now the city of Ichihara, Chiba. It was ruled for the entirety of its history by a branch of the Mizuno clan. The name of “Tsurumaki” came from the Mizuno "kamiyashiki" in Edo, which was located in Wadeda-Tsurumaki-cho.