Sakazaki Naomori

Who They Were

Sakazaki Naomori (坂崎直盛, さかざき なおもり) was a samurai and daimyō — a territorial lord — whose career spanned the violent transition from the Sengoku period of competing warlords to the settled Tokugawa order of the early Edo period. He was born in 1563, in the sixth year of the Eiroku era, and died on 21 October 1616. He is a useful figure for students of Japanese history precisely because his life tracks the era's upheavals: he began as a retainer of the Ukita house, fought on the losing side at Sekigahara's approach, defected to Tokugawa Ieyasu, and was rewarded with a domain of his own.

His father was Ukita Tadaie. That connection placed Naomori inside one of the great military families of western Japan, and it shaped the first half of his life entirely.

Life and Career

Naomori was born into the Ukita family and was first known as Ukita Akiie (宇喜多 詮家). He served his uncle, Ukita Naoie, a powerful warlord who built the Ukita house into a major force in the region. After Naoie's death, Naomori transferred his service to Naoie's son, Ukita Hideie, continuing as a retainer of the same house across two generations of its leadership.

His military career included participation in the campaign against the Uesugi of Aizu. The Aizu campaign of the late 1590s was one of the last great mobilisations before the decisive struggle between Tokugawa Ieyasu and his rivals, and it drew large numbers of daimyō and their retainers eastward.

The defining turn in Naomori's career came during the Sekigahara campaign. Ukita Hideie commanded forces on the Western army side, opposing Tokugawa Ieyasu. Naomori left the Ukita ranks and joined the Eastern army under Tokugawa. This was a defection against his own kin and his hereditary lord, and it was the decision that determined the rest of his life.

After the war, Tokugawa Ieyasu granted him lordship of the Tsuwano domain. Ieyasu also gave him the new family name Sakazaki (坂崎), replacing the Ukita name he had been born with. The grant of a name by the victorious overlord was both an honour and a marker of dependence: Naomori's standing now rested on Tokugawa favour rather than on the Ukita lineage he had abandoned.

He died on 21 October 1616. His life ended only two years after the Siege of Osaka closed the last serious military challenge to Tokugawa rule, so his entire career sits inside the window in which Japan was unified under a single military government.

Why They Matter

Sakazaki Naomori matters as a case study in how the Tokugawa settlement was built out of defection. The establishment of the Edo shogunate depended on warlords who switched sides at the right moment, and Naomori is one of the clearest examples. He abandoned the Ukita house — his own family — for Tokugawa Ieyasu, and the reward was a domain.

His career also illustrates how thoroughly the new order rewrote identity. A man born Ukita Akiie died as Sakazaki Naomori, carrying a name conferred by the shogun. For a Japanese warrior, the family name was not a neutral label; it declared lineage, obligation, and the house one served. To be renamed by Ieyasu was to be re-founded as a Tokugawa client.

Finally, his trajectory shows the compression of the era. Born in 1563 into a world of contending regional lords, he died in 1616 as the lord of a recognised domain under a national military government. The whole arc of unification happened within his lifetime, and his own choices — service, defection, reward — were the mechanism by which it happened.

The Name in Japanese

The name is written 坂崎直盛.

• Kanji: 坂崎直盛
• Kana: さかざき なおもり
• Romaji: Sakazaki Naomori

Character by character:

坂 — read saka here. It means "slope" or "hill." It is a common element in Japanese place names and surnames, describing terrain.

崎 — read zaki here. It means "cape," "promontory," or "small peninsula." Note the sound change: the character is normally read saki, but in compounds it often voices to zaki, which is why the surname is Sakazaki and not Sakasaki. This voicing of an initial consonant mid-compound is a regular feature of Japanese pronunciation.

Together, 坂崎 (Sakazaki) is a topographic surname — roughly "slope cape" — the kind of name derived from a landscape feature. Ieyasu granted this name to Naomori, so the surname itself records a political act rather than a hereditary origin.

直 — read nao here. It means "straight," "upright," or "honest." It is a very common element in male given names of the period.

盛 — read mori here. It means "prosper," "flourish," or "abundant." It too appears constantly in samurai given names, where it carries a wish for the house's prosperity.

So the given name 直盛 (Naomori) can be read as "upright and flourishing" — a conventional warrior's name built from two auspicious characters. The full name 坂崎直盛 thus combines a granted topographic surname with a given name expressing the standard virtues expected of a samurai retainer.

For learners, the key points are the saki to zaki voicing in 崎, and the fact that both characters of the given name are read with their kun (native Japanese) readings rather than their Chinese-derived on readings.

Legacy

Naomori's legacy is bound up with the domain he received rather than with any battle he won. As lord of Tsuwano, he became the first of the Sakazaki line to hold that territory, and his tenure belongs to the earliest phase of domain government under Tokugawa rule.

His career is remembered chiefly as an example of the calculations that warlords made in 1600. The choice to leave the Ukita for the Tokugawa was rewarded with land and a name, and it secured him a place among the daimyō of the new order. He died in 1616, six years after the shogunate was firmly established, leaving behind a name that Ieyasu had given him and a domain that Tokugawa victory had made possible.