(1640-
1711) was the
daimyō (lord) of
Sendai han for about two years, from 1658 to
1660. His father,
Date Tadamune, died in 1658, but Tsunamune's succession and rule was soon opposed by a number of his kinsmen and vassals. This dispute eventually led to the
Date Sōdō or "Date Disturbance" of 1671, which has been retold in theatre, and has become one of the more well-known tales of unrest and disunity among the daimyō of the
Edo period.
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