The site of the Oyumi jin'ya is now under a residential area of the city of Chiba.
Oyumi Domain was created in February 1627, when Morikawa Shigetoshi, a hatamoto in the service of Shōgun Tokugawa Hidetada acquired holdings in Sagami, Kazusa and Shimōsa Provinces with revenues exceeding the 10,000 koku necessary to qualify as a daimyō.
He was allowed to build a jin'ya on the site of the Sengoku period Oyumi Castle.
He later rose to the post of rōjū, and committed junshi on the death of Tokugawa Hidetada.
As with most domains in the han system, Oyumi Domain consisted of several discontinuous territories calculated to provide the assigned kokudaka, based on periodic cadastral surveys and projected agricultural yields.