Sendai Domain

Sendai Domain (仙台藩, Sendai-han^?) was a Japanese domain of the Edo period. Most of its holdings were contiguous, covering all of present-day Miyagi Prefecture, small portions of southern Iwate Prefecture, and a portion of northeastern Fukushima Prefecture.

The domain's capital, and the ruling family's castle, were located in what became the modern Sendai City. Ruled for the entirety of its history by the Date clan; another name of this domain is the Date Domain (伊達藩, Date-han^?)

It constituted the largest domain in northern Japan, with its official income rating at 625,000 koku, and one of the largest domains in the entire country, after the Satsuma Domain and Kaga Domain. Its jitsudaka, or true income level, is said to have been somewhere between one and two million koku. Sendai was the focal point of the Ouetsu Reppan Domei during the Boshin War. Unlike the nearby Aizu domain, Sendai survived the war largely intact, though with a severely reduced income rating. It was disbanded with the other domains in 1873.

The Sendai domain was founded in the closing years of the 16th century. When Date Masamune presented himself to Toyotomi Hideyoshi, who was undertaking the Odawara Campaign, he was granted the former fiefs of the Kasai 葛西 and Ōsaki 大崎 families, in return for his hereditary lands of Yonezawa 米沢, Aizu 会津, and Sendō 仙道. Upon entry into his new fief, Masamune took up residence in Iwadeyama Castle, and then started construction on Sendai Castle. The name of Sendai at this time was written 千代, however, Masamune changed it to 仙臺 (Later changed to the current 仙台）("hermit's platform," presumably alluding to Chinese mysticism). During the Sekigahara Campaign, the Date clan had been promised an increase in formal domain income to one million koku; however, as they were fighting with the Uesugi clan for their old lands in the Date district, this did not come to pass.

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