other · Korea and Japan

Date clan domain

1542 CE – 1600 CE (approx.) · capital Yonezawa, later Iwadeyama

The domain of the Date of southern Mutsu, which under the one-eyed Date Masamune briefly dominated northeastern Japan.

Origins

The Date had long held lands in southern Mutsu. Date Tanemune issued the detailed Jinkai-shu law code in 1536, and from 1542 a war with his son Harumune split the clan; Harumune won and in 1548 moved the family seat to Yonezawa.

Rule and society

The Date built power through marriage alliances with neighbouring families across the Tohoku. Date Masamune, who lost an eye to smallpox as a child, became head in 1584 and expanded aggressively, defeating the Ashina at Suriagehara in 1589 to take Aizu, briefly controlling much of southern Tohoku.

Decline and legacy

Masamune submitted late to Toyotomi Hideyoshi in 1590, lost Aizu and in 1591 was moved to Iwadeyama. Siding with Tokugawa Ieyasu in 1600, he founded the Sendai Domain, which the Date ruled until 1871.

Lineage

Date clan domainSendai Domain 1600 CE – 1871 CE

Connections (1)

Date clan domain was a vassal of Toyotomi regime1590 CE – 1598 CE

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Cite this page

APA: The Epoch Institute. (2026). Date clan domain. In The Epoch Institute States Register. https://the-epoch-institute.org/state/date-clan-domain
MLA: “Date clan domain.” The Epoch Institute States Register, The Epoch Institute, 2026, https://the-epoch-institute.org/state/date-clan-domain. Accessed .
Chicago: The Epoch Institute. “Date clan domain.” The Epoch Institute States Register. 2026. https://the-epoch-institute.org/state/date-clan-domain.
Harvard: The Epoch Institute (2026) ‘Date clan domain’, The Epoch Institute States Register. Available at: https://the-epoch-institute.org/state/date-clan-domain (Accessed: ).

Last reviewed October 2026Random state ↻