Daimyo
 was "daimyō" of Owari Domain during early-Edo period Japan.
Biography.
Tokugawa Tsunanari was the son of the second "daimyō" of Owari Domain, Tokugawa Mitsutomo by his official wife, Chiyohime later Reisen-in, the daughter of "shōgun" Tokugawa Iemitsu. Although Mitsutomo's second son, he was given the position of first son and heir over his elder brother, who had been born to a concubine. He undertook his "genpuku" ceremony under Shogun Tokugawa Ietsuna on April 5, 1657, and was given the adult name of the "Tsunayoshi". He changed his name to "Tsunanari" to avoid confusion with an uncle of the same name who was daimyō of Tatebayashi Domain. His childhood name was Gorota (五郎太).
On the retirement of his father on April 27, 1693, Tsunanari became the 3rd Tokugawa "daimyō" of Owari Domain, with 3rd court rank and the courtesy title of Chūnagon. Although officially "daimyō", all power remained in the hands of his retired father and Tsunanari spent most of his time in various scholarly pursuits, including starting work on a comprehensive history of Owari Province in 1698. In addition to his official wife (a daughter of court noble Hirohata Tadayki), Tsunanari had 16 concubines, by whom he had a total of 40 children (22 male, 18 female).
Tsunanari died on July 1, 1699, by eating a tainted strawberry, and was succeeded by his 10th son, Tokugawa Yoshimichi. He was posthumously awarded 2nd Court Rank and the courtesy title of Dainagon. His grave is at the Owari Tokugawa clan temple of Kenchū-ji in Nagoya.