Lifespan: 15xx to 10/9 of Tenshō 14 (1586)
Rank: bushō, sengoku daimyō
Title: Master of the Palace Table
Father: Tamura Takaaki
Mother: Daughter of Date Tanemune
Siblings: Kiyoaki, Ujiaki, sister (wife of Ishikawa Tanemitsu)
Wife: Okata (daughter of Sōma Akitane)
Adopted Children: Muneaki (adopted heir – natural son of Ujiaki)
Tamura Kiyoaki served as a bushō and sengoku daimyō of Mutsu Province during the Sengoku and Azuchi-Momoyama periods. Kiyoaki was the twenty-fifth head of the Tamura clan.
The Tamura clan descended from Sakanoue no Tamuramaro, a noble and bukan, or military officer, from the Heian period.
Kiyoaki was born as the lineal heir of Tamura Takaaki. His mother was the daughter of Date Tanemune. Similar to Takaaki, Kiyoaki was known as an intelligent bushō and, after the death of his father, succeeded him as the head of the clan.
To counter the Satake and Ashina clans, Kiyoaki arranged for the marriage of his only child, Megohime, to Date Masamune. By receiving the support of the Date army, Kiyoaki was able to maintain his independence. In a territorial dispute between the Date clan and the Sōma clan (the original family of Kiyoaki’s formal wife), Kiyoaki called upon Satake Yoshishige and Iwaki Tsunetaka to intervene and pressure Date Terumune so that the two sides could settle on the condition that Sōma Yoshitane return Marumori Castle to the Date. This outcome reflected the involvement of Okata-fujin (Kiyoaki’s formal wife from the Sōma) and the fact that the Tamura and Sōma families maintained their traditional independence from the Date.
It appears that Kiyoaki maintained friendly relations with Oda Nobunaga. A letter from Nobunaga notes that Kiyoaki killed many soldiers at the Battle of Nagashino in 1575. At this time, he was invested with the title of Master of the Palace Table.
Kiyoaki did not have any children other than Megohime so, in 1586, after his demise, a dispute arose over the succession within the Tamura family that also involved the Date and the Sōma clans. Thereafter, upon the direction of Date Masamune, Tamura Muneaki (the son of Kiyoaki’s younger brother, Tamura Ujiaki), became the successor.