In 1600,
Tōdō Takatora,
daimyō of
Uwajima Domain received an increase in
kokudaka to 200,000
koku for his services in the
Battle of Sekigahara and relocated his seat to Kokubunyama Castle in Imabari and established Imabari Domain. However, since Kokubunyama Castle is a medieval mountain castle, it was an inconvenient location to build a
castle town, so in 1602, construction of a modern castle was started, and Imabari Castle was completed a year later. In 1608, he was transferred to
Tsu Domain with control over the two provinces of
Ise and
Iga, leaving is adopted son Tōdō Takayoshi as lord of a 20,000
koku remnant of the domain centered at Imabari Castle. Tōdō Takayoshi was transferred to Nabari in Iga Province in 1635. In the same year, the
Tokugawa shogunate transferred
Matsudaira Sadayuki form
Kuwana Domain to
Iyo-Matsuyama Domain, and raised his younger brother
Matsudaira Sadafusa from 7,000
koku at Ise Nagashima Castle to 30,000
koku as daimyō of Imabari. In 1665, Sadafusa was appointed to the position of castellan of
Edo Castle, for which he received an additional 10,000
koku from
Musashi,
Shimōsa, and
Hitachi Provinces as a his stipend, raising his total to 40,000
koku. Sadatoki left 5000
koku in the
Kantō region in his will to his younger brother, reducing the
kokudaka of Imabari Domain to 35,000
koku. In 1698, 5,000
koku of land in Kantō was exchanged for 5,000
koku in
Uma District. The industries that supported the clan's finances include salt, cotton, and sweet potatoes as domain monopolies. In 1805, the 7th
daimyō, Matsudaira Sadayoshi, set up "Kōshoba", the predecessor of the
han school. In 1807, the "Kōshoba" was expanded and changed its name to "Katsumeikan". In 1863, during the
Bakumatsu period, the 10th
daimyō, Matsudaira Sadanori, reformed the domain military with Western style firearms and built an artillery battery on the coast. He also tried to a mediate between the shogunate and the
Sonnō jōi loyalists, and stayed in
Kyoto for a long time. During the
Second Chōshū expedition in 1865, he determined the situation of the shogunate was hopeless, and decided to side with to the Imperial Court. In the
Battle of Toba-Fushimi in 1868, he quickly sent troops to Kyoto and guarded the
Kyoto Imperial Palace. In the subsequent battles of the
Boshin War, the clan served with the
Meiji government army. This was a very different stance from Iyo-Matsuyama Domain, which continued its support of the shogunate. In 1868, Matsudaira Sadanori renounced the Matsudaira name and styled himself "Hisamatsu Sadanori". In 1871, Imabari Domain became "Imabari Prefecture" due to the
abolition of the han system and establishment of prefectures. After that, it was incorporated into Ehime Prefecture via Matsuyama Prefecture and Sekitetsu Prefecture. In 1884, Hisamatsu Sadnori became a
viscount in the
kazoku peerage. ==Holdings at the end of the Edo period==