It controlled a small portion of eastern Bitchū Province and was centered around Ashimori jin'ya in what is now Kita-ku, Okayama.

[1][2][3] Rangaku scholar Ogata Kōan, who founded Tekijuku academy, the predecessor of Osaka University was from Ashimori Domain.

Kinoshita Iesada, the older brother of Toyotomi Hideyoshi's wife Kita no Mandokoro, and the lord of Himeji Castle in Harima Province, was transferred to Ashimori after the Battle of Sekigahara and was confirmed in his previous kokudaka of 25,000 koku.

However, in 1799, about 22,000 koku of the fief owned by the 9th daimyō, Kinoshita Toshihisa, was transferred to Date and Shinobu counties in Mutsu Province (now part of Fukushima Prefecture).

The building no longer exists, but the moat and portions of the stone walls remain and are an Okayama City Historic Site, while its gardens are an Okaya Prefectural Place of Scenic Beauty.