Tokugawa Tsunanari

Who They Were

Tokugawa Tsunanari (徳川綱誠) was a daimyo — a hereditary feudal lord — of the Owari Domain in early-Edo period Japan. He was born on September 4, 1652, in the first year of the Jōō era (承応), and died on July 1, 1699. He belonged to the Tokugawa family, the house that had held the shogunate since 1603, and his life unfolded entirely within the Edo period (1603–1868), the long span of peace and rigid social order that followed centuries of civil war.

The Owari Domain was one of the three great collateral branches of the Tokugawa house, known collectively as the gosanke (御三家), the "three honourable houses." These branches were founded by sons of the first shogun, Tokugawa Ieyasu, and were positioned to supply an heir to the shogunate should the main line fail. Tsunanari's father was Tokugawa Mitsutomo, the second lord of Owari. His mother was Reisen'in. Through both parents he stood near the centre of the Tokugawa political world, and his career was shaped by that position from birth.

Life and Career

Tsunanari was born in 1652, the same year the Jōō era began, into the Owari Tokugawa household. His father, Mitsutomo, was the second head of the domain, and Tsunanari was raised as his heir. As a daimyo of one of the gosanke, he occupied a rank just below the shogunal family itself, with an income and ceremonial standing that placed him among the most powerful lords in Japan.

He married two women recorded in the family's records: Hirohata Shinkimi (広幡新君) and Honzuin (本寿院), the latter identified as the birth mother of Tokugawa Yoshitomo. He fathered a large family. His sons included Tokugawa Yoshimichi, Tokugawa Muneharu, and Tokugawa Tsugutomo, each of whom would in turn head the Owari house. His daughters included Kichihime and a daughter known as Tokugawa Matsuhime, who became the principal wife of Maeda Yoshinori. He also had sons named Matsudaira Yoshitaka and Matsudaira Michimasa.

Tsunanari died on July 1, 1699, at the age of forty-six. He was succeeded as lord of Owari by his son Tokugawa Yoshimichi. The line he left behind would govern the domain for the remainder of the Edo period, and three of his sons in succession would hold its headship.

Why They Matter

Tsunanari's importance lies less in any single act than in his place in the Tokugawa dynastic system. The gosanke existed to guarantee that a Tokugawa would always sit as shogun, and the Owari branch was the senior of the three. A lord of Owari was therefore not merely a regional governor but a potential source of shogunal heirs, and the marriages and births within his household were matters of national consequence.

His own children carried that function forward. The sons who succeeded him — Yoshimichi, Muneharu, and Tsugutomo — kept the Owari line unbroken across three generations. His daughter's marriage into the Maeda family, lords of Kaga, tied Owari to another of the largest domains in Japan. Through these alliances and successions, Tsunanari's household remained one of the structural pillars of Tokugawa rule throughout the Edo period.

The Name in Japanese

The name is written 徳川綱誠. In kana it reads とくがわ つななり, and in romaji it is Tokugawa Tsunanari. The family name comes first, as is conventional in Japanese.

Breaking the name down character by character:

徳 (とく, toku) — virtue, moral excellence. This is the first character of the Tokugawa surname. The Tokugawa adopted it from an earlier branch of the family, and it became one of the most recognisable characters in Japanese history.

川 (がわ, gawa) — river. Combined with 徳, it forms 徳川, "Tokugawa." Note that the reading shifts from the standalone kawa to gawa when it follows another element, a common sound change in Japanese compounds.

綱 (つな, tsuna) — rope, cord, or cable; by extension, a main line or guiding principle. In personal names it is a common element and here gives the first part of the given name.

誠 (なり, nari) — sincerity, truth, fidelity. This is the final character of the given name. Its standalone reading is makoto, but in this name it is read nari, a reading that appears in personal names.

The given name 綱誠 is thus Tsunanari. The element 綱 was a recurring character in the names of Owari lords, marking their shared lineage, while 誠 carried a moral connotation of sincerity. Together, 徳川綱誠 encodes both the family's identity and the personal name of the man who bore it.

Legacy

Tsunanari's legacy is dynastic. Three of his sons — Tokugawa Yoshimichi, Tokugawa Muneharu, and Tokugawa Tsugutomo — followed him as heads of the Owari Domain, ensuring that the senior branch of the gosanke continued without interruption. His daughters' marriages extended the family's connections into other great houses, including the Maeda of Kaga.

He is remembered as one of the lords who held the Owari Tokugawa line steady during the middle decades of the Edo period, a time when the domain's role as a reservoir of shogunal heirs gave it enduring political weight. The household he led remained a fixture of the Tokugawa order until the shogunate itself ended in 1868.