Tsunamura was the eldest son of
Date Tsunamune by a concubine. His childhood name was Kamechiyo-maru (亀千代丸). He was later styled , but his name was changed to Date Tsunamura during his
genpuku ceremony, which was held by
shōgun Tokugawa Ietsuna. In later life, his
courtesy title was
Sakonoe-gon-shōshō (General of the Left Guards) and
Mutsu-no-kami and his
Court rank was Senior Fourth Rank, Lower Grade. Tsunamura became
daimyō at the age of 2, when his father was relieved of his position due to political manipulations by his uncles,
Date Munekatsu,
daimyō of
Ichinoseki Domain and Date Masamune's 10th son, and
Tamura Muneyoshi,
daimyō of
Iwanuma Domain. From 1660 to 1671, the two uncles acted as guardians for the infant Tsunamura, usurping his authority and becoming notorious for their greed, corruption and misgovernment. The domain was beset by constant peasant rebellions and (according to popular history) Tsumanura narrowly avoided assassination by his uncles on several occasions. Events came to a head with the
Date Sōdō, which also became a favorite theme of popular fiction, including
bunraku and
kabuki. Aki Muneshige, a relative from a cadet branch of the Date clan and retainer of Date Tsunamune managed to register a complaint to the shogunate officials about the mismanagement of the domain. Aki and various domain officials were summoned before the council of
rōjū and the
Tairō Sakai Tadakiyo. Testimony between Aki and the retainers of Munekatsu and Muneyoshi did not agree, and the testimony of Munekatsu's retainer Harada Munesuke made a particularly poor impression. Harada then murdered Aki before further testimony could be given, before being killed himself by the guards. The court ruled in favor of Aki. Tsunamura was allowed to remain
daimyō; however, his uncles Munekatsu and Muneyoshi were removed from office. Once Tsunamura actually was able to exercise his own authority, one of his first actions was to order the construction of
windbreaks and irrigation and
flood control works on rivers. He also emphasized the study of
Confucianism, bringing several noted scholars to Sendai, as well as sponsoring the construction of numerous Buddhist temples and
Shinto shrines. From 1689 to 1690 he assisted in the repair of the
Nikkō Tōshō-gū along with
Ii Naooki of
Hikone Domain. Through these efforts, he gained the reputation of being a good ruler; however, the fiscal burden of all of these public works and temple building drove the domain into debt. In 1683, the domain issued a
paper currency; however, with rampant
inflation, the domain money was not well received. In 1693, his senior retainers had enough, and through senior clan members issued a petition to Tsunamura warning against rule by tyranny. Tsunamura was reportedly rendered speechless with rage, but was unable to gather support. In Autumn 1697, with no sign that he would voluntarily reign from office, his retainers plotted to have him forcibly placed into retirement, but no agreement could be reached. Tsunamura remained in office until 1703, when he resigned in favor of his cousin,
Date Yoshimura, as he had no son by his wife (the daughter of
Inaba Masanori). Tsunamura died in 1719, and his grave is at Dainenjiyama in Sendai, rather than the Date clan mausoleum. In 1924, he was posthumously elevated to Senior Third Rank. ==Family==