was a Japanese daimyo

Daimyo

is a generic term referring to the powerful territorial lords in pre-modern Japan who ruled most of the country from their vast, hereditary land holdings...

 of the early Edo period

Edo period

The , or , is a division of Japanese history which was ruled by the shoguns of the Tokugawa family, running from 1603 to 1868. The political entity of this period was the Tokugawa shogunate....

, who served as lord of the Tsuwano Domain

Tsuwano Domain

The ' was a Japanese domain of the Edo period, located in Iwami Province . The Meiji-era author Mori Ōgai was the son of a Tsuwano retainer.-List of Daimyo:*Sakazaki clan #Sakazaki Naomori...

.
Originally from Joseon

Joseon Dynasty

Joseon , was a Korean state founded by Taejo Yi Seong-gye that lasted for approximately five centuries. It was founded in the aftermath of the overthrow of the Goryeo at what is today the city of Kaesong. Early on, Korea was retitled and the capital was relocated to modern-day Seoul...

, Sakazaki helped Japanese army during the Japanese invasions of Korea. He became a confidant of Ukita Hideie

Ukita Hideie

was the daimyo of Bizen and Mimasaka provinces , and one of the council of Five Elders appointed by Toyotomi Hideyoshi. Son of Ukita Naoie, he married Gohime, a daughter of Maeda Toshiie...

 (宇喜多 秀家). After the war, Ukita took Sakazaki with him and welcomed him into his family and named him Ukita Ukyo no suke Naomori (宇喜多 右京 亮 直成).
He took part in the attack against the Uesugi of Aizu

Aizu

is an area comprising the westernmost third of Fukushima Prefecture in Japan. The principal city of the area is Aizuwakamatsu.During the Edo period, Aizu was a feudal domain known as and part of Mutsu Province.-History:...

, and later in the Sekigahara campaign, he left Ukita's Western army and joined Tokugawa

Tokugawa Ieyasu

 was the founder and first shogun of the Tokugawa shogunate of Japan , which ruled from the Battle of Sekigahara  in 1600 until the Meiji Restoration in 1868. Ieyasu seized power in 1600, received appointment as shogun in 1603, abdicated from office in 1605, but...

's eastern army. After the war, he was given an estate in Hamada

Hamada

A hamada is a type of desert landscape consisting of largely barren, hard, rocky plateaus, with very little sand. A hamada may sometimes also be called a reg , though this more properly refers to a stony plain rather than a highland.Hamadas exist in contrast to ergs, which are large areas of...

 (濱田). 15 years later, he was also awarded lordship of the Tsuwano domain for his effort during the siege of Osaka

Siege of Osaka

The was a series of battles undertaken by the Tokugawa shogunate against the Toyotomi clan, and ending in that clan's destruction. Divided into two stages , and lasting from 1614 to 1615, the siege put an end to the last major armed opposition to the shogunate's establishment...

.
Tokugawa Ieyasu

Tokugawa Ieyasu

 was the founder and first shogun of the Tokugawa shogunate of Japan , which ruled from the Battle of Sekigahara  in 1600 until the Meiji Restoration in 1868. Ieyasu seized power in 1600, received appointment as shogun in 1603, abdicated from office in 1605, but...

also gave him a new name Sakazaki (坂崎).