was a Japanese military commander and Deputy Shogun

Shogun

A was one of the hereditary military dictators of Japan from 1192 to 1867. In this period, the shoguns, or their shikken regents , were the de facto rulers of Japan though they were nominally appointed by the emperor...

 of the Hosokawa clan

Hosokawa clan

The ' was a Japanese samurai clan, descended from Emperor Seiwa and a branch of the Minamoto clan, by the Ashikaga clan. It produced many prominent officials in the Ashikaga shogunate's administration. In the Edo period, the Hosokawa clan was one of the largest landholding daimyo families in Japan...

 in the end of the Muromachi period

Muromachi period

The is a division of Japanese history running from approximately 1336 to 1573. The period marks the governance of the Muromachi or Ashikaga shogunate, which was officially established in 1338 by the first Muromachi shogun, Ashikaga Takauji, two years after the brief Kemmu restoration of imperial...

 and Sengoku period

Sengoku period

The or Warring States period in Japanese history was a time of social upheaval, political intrigue, and nearly constant military conflict that lasted roughly from the middle of the 15th century to the beginning of the 17th century. The name "Sengoku" was adopted by Japanese historians in reference...

 of the 16th century. He was the foster son of Hosokawa Takakuni

Hosokawa Takakuni

Hosokawa Takakuni was the most powerful military commander in the Muromachi period under Ashikaga Yoshiharu, the twelfth shogun. His father was Hosokawa Masaharu, who was the branch of the Hosokawa clan....

.

In 1543, Ujitsuna raised his armies in revenge for Takakuni who was killed by Hosokawa Harumoto

Hosokawa Harumoto

was a Japanese daimyo of the Muromachi and Sengoku periods, and the head of the Hosokawa clan. Harumoto's childhood name was Sōmei-maru . He was born to Hosokawa Sumimoto, another renowned samurai of the Muromachi era....

. He was at a great disadvantage at first, because Harumoto had great powers. However, Miyoshi Nagayoshi who was the retainer of Harumoto betrayed Harumoto and took sides with Ujitsuna. In 1549, at last, Ujitsuna pulled off expelling Harumoto to Ōmi Province

Omi Province

is an old province of Japan, which today comprises Shiga Prefecture. It was one of the provinces that made up the Tōsandō circuit. It is nicknamed as .Lake Biwa, Japan's largest lake, is located at the center of the province...

.

In 1552, Ujitsuna marched his armies along with Nagayoshi, and appointed to Kanrei

Kanrei

or, more rarely, kanryō, was a high political post in feudal Japan; it is usually translated as Shogun's Deputy. After 1349, there were actually two Kanrei, the Kyoto Kanrei and the Kantō Kanrei....

. However, a puppet of Nagayoshi, Ujitsuna didn't have any powers. After that, Ujitsuna was given Yodo castle at Settsu province

Settsu Province

was a province of Japan, which today comprises the eastern part of Hyōgo Prefecture and the northern part of Osaka Prefecture. It was also referred to as or .Osaka and Osaka Castle were the main center of the province.-History:...

and monitored by Nagayoshi.

In 1564, he died in despair and hopelessness.