Iio Tsuratatsu

Who They Were

Iio Tsuratatsu (飯尾連竜, いいお つらたつ) was a samurai commander who served the Imagawa clan during the closing decades of the Muromachi period (1336–1573). He was the son of Iio Noritsura and held Hikuma Castle in Tōtōmi province. He was married to Otazu no kata, a woman whose own reputation in the historical record outlasted his. His life ended in 1565, in the eighth year of the Eiroku era (永禄, えいろく), when his own lord had him killed.

The Iio were a warrior house whose fortunes were tied to the Imagawa, one of the great provincial powers of central Japan. Tsuratatsu inherited both the family name and its obligations, and for most of his career he appears to have met them. What destroyed him was not battlefield defeat but a single act of divided loyalty.

Life and Career

Tsuratatsu succeeded his father, Iio Noritsura, as head of the Iio house. He served Imagawa Ujizane, the son and heir of Imagawa Yoshimoto, and was entrusted with Hikuma Castle in Tōtōmi province — a position of real responsibility, since Tōtōmi lay on the eastern edge of Imagawa territory, facing the expanding power of Tokugawa Ieyasu.

That frontier position shaped everything that followed. In 1564, the Imagawa learned that Tsuratatsu was secretly communicating with Tokugawa Ieyasu. Whether he was hedging against Imagawa decline, responding to pressure from a stronger neighbour, or pursuing a private grievance, the discovery turned him from a trusted retainer into a suspected traitor. The Imagawa attacked Hikuma Castle.

The castle held. That detail matters: Tsuratatsu's defences were strong enough to survive an assault by his own overlord's forces, and he was not taken by storm. The following year, 1565, Imagawa Ujizane summoned him to Suruga. It was a summons he apparently could not refuse, and it was a trap. Tsuratatsu was assassinated there.

His death in 1565 places him among the many Sengoku-era commanders whose end came not in open battle but through the political violence that ran through the period's warrior houses. The Imagawa themselves were in steep decline; their defeat by Oda Nobunaga at Okehazama in 1560 had already begun the unravelling of their domain, and the suspicion and internal purges of the years that followed were symptoms of a house losing its grip.

Why They Matter

Tsuratatsu's career is a compact illustration of how the Sengoku period actually worked at the level of a single castle and a single family. The grand narrative of the era is one of unification — Oda Nobunaga, Toyotomi Hideyoshi, Tokugawa Ieyasu — but the mechanism of that unification was the steady erosion of regional lords like the Imagawa, and the corresponding pressure on the men who served them.

A retainer holding a frontier castle had to calculate constantly. Loyalty to a weakening lord could mean destruction; contact with a rising neighbour could mean accusation of treason. Tsuratatsu made contact with Tokugawa Ieyasu and was killed for it. His case shows that the Imagawa leadership, in its final years, treated such contact as a capital matter — and that it was willing to use a summons and an assassination rather than a trial or a battlefield to settle the question.

He also matters because of who he was married to. Otazu no kata is remembered in her own right, and the historical record references Tsuratatsu through her as much as through his own actions. His story survives partly because hers did.

The Name in Japanese

The full name is written 飯尾連竜, read in kana as いいお つらたつ, and romanised as Iio Tsuratatsu. The surname is sometimes rendered Inoo; the kana いいお gives the standard reading.

飯 (いい, ii) — the first character of the surname. It means "cooked rice" or "meal." It is a common element in Japanese surnames and place names, and it appears here as part of the family name rather than as a word with independent meaning in this context.

尾 (お, o) — the second character of the surname. It means "tail" or "end," and also refers to the lower slope of a mountain. Together, 飯尾 forms the house name Iio.

連 (つら, tsura) — the first character of the given name. It means "to connect," "to link," or "to accompany," and it carries the sense of things joined in a series. As a naming element it suggests continuity or association, and it was a common component in warrior given names of the period.

竜 (たつ, tatsu) — the second character of the given name. It means "dragon." The character is the simplified form of 龍, the older and more elaborate way of writing the same word. A dragon in a warrior's name carried associations of power and ascendancy, and 竜/龍 appears frequently in the given names of Sengoku commanders.

The given name 連竜 therefore reads as something like "linked dragon" or "accompanying dragon" — a name built from two elements that each carried weight in warrior naming conventions. Note that the character 連 is read つら here, not its more familiar reading れん, and 竜 is read たつ, not りゅう. Japanese personal names frequently use readings that differ from a character's everyday pronunciation, and this name is a straightforward example of that pattern.

Legacy

Tsuratatsu's legacy is bound up with two things: the castle he held and the wife who outlived him in memory. Hikuma Castle, in Tōtōmi province, was the stage on which his loyalty was tested and where his defences held against his own lord's attack. The castle's survival in 1564 is the one unambiguous success of his career.

His death in 1565 made him an example rather than a victor. He is remembered as a retainer of the Imagawa who opened a channel to Tokugawa Ieyasu and paid for it with his life — a fate that says as much about the Imagawa clan's final years as it does about him. The house he served was already in decline, and the men who sensed that decline and looked elsewhere were treated as threats rather than as warnings.

Through his marriage to Otazu no kata, his name also persists in the record of the women of the Sengoku period, whose stories are far less frequently preserved than those of their husbands and fathers.