In 1601, Tokugawa Ieyasu established Ōgaki Domain, installing Ishikawa Yasumichi as daimyō with a kokudaka of 50,000 koku. The Ishikawa clan were transferred to Hita Domain in Bungo Province in 1616 as a reward for their services at the Battle of Osaka. They were replaced by a cadet branch of the Hisamatsu-Matsudaira from 1616 to 1624, followed by the Okabe clan from 1624 to 1633, and then by another cadet branch of the Hisamatsu-Matsudaira from 1633 to 1635.[1]
Toda Ujikane was instrumental in opening new rice fields, irrigation and flood control measures, planting of forests and reforming the remuneration system for his retainers. He also maintained Ōgaki Castle. under the 3rd daimyō , Toda Ujisada, 3000 koku of new rice fields were given to his brother, Toda Ujishige, which when combined with the 7000 koku already under his name, placed him over the threshold to become daimyō of a cadet domain, the Ōgaki Shinden Domain. This sub-domain would also endure to the Meiji restoration. The 6th daimyō, Toda Ujihide, attempted to implement fiscal reforms, which failed due to a peasant's revolt in 1766. The 7th daimyō, Toda Ujinori, served as a rōjū under Tokugawa Ienari during a time of increasing Russian incursions into Japanese northern waters. The 8th daimyō, Toda Ujitsune, founded the han school, "Chidokan" in 1840. The 9th daimyō, Toda Ujimasa reformed the domain's military in 1856. The 10th daimyō, Toda Ujiakira attempted further reforms, but was frustrated by the Ansei Purge. The final daimyō, Toda Ujitaka was branded an "enemy of the crown" after the Battle of Toba-Fushimi in the Boshin War, but was able to defect to the imperial side and served as messenger of the court to other domains along the Tōsandō to urge them to submit. He was later awarded a 30,000 koku increase by the Meiji government, but soon afterwards Ōgaki Domain became Ōgaki Prefecture due to the abolition of the han system, and was then absorbed into the new Gifu Prefecture.[1]
Bakumatsu period holdings
As with most domains in the han system, Ōgaki Domain consisted of several discontinuous territories calculated to provide the assigned kokudaka, based on periodic cadastral surveys and projected agricultural yields.[2][3]