was a Japanese

samurai were the hereditary military nobility and officer caste of medieval and early-modern Japan from the late 12th century until their abolition in 1876. They were the well-paid retainers of the '' daimyo'' (the great feudal landholders). They h ...

and military commander of the

Sengoku period The was a period in History of Japan, Japanese history of near-constant civil war and social upheaval from 1467 to 1615. The Sengoku period was initiated by the Ōnin War in 1467 which collapsed the Feudalism, feudal system of Japan under the ...

. He was the lord of the Obama Castle. Sadatsuna belonged under the command of

Tamura Kiyoaki was a Japanese samurai and head of the Tamura clan. Tamura clan was a daimyō were powerful Japanese magnates, feudal lords who, from the 10th century to the early Meiji period in the middle 19th century, ruled most of Japan from thei ...

. But Sadatsuna switched from the

Tamura clan Tamura (usually written 田村), a Japanese placename and family name, may refer to: In places: *Tamura, Fukushima, a city in Japan *Tamura District, Fukushima is a district located in Fukushima Prefecture, Japan. As of 2003 population data but ...

to the

Ashina clan Ashina may refer to: *Ashina tribe, a ruling dynasty of the Turkic Khaganate *Ashina clan (Japan), one of the Japanese clans *Ashina District, Hiroshima, a former Japanese district *Empress Ashina (551–582), empress of the Chinese/Xianbei dynasty ...

and he became independent of the Tamura clan. Later, he served the

Date clan The is a Japanese samurai kin group. Papinot, Jacques Edmond Joseph. (1906). ''Dictionnaire d’histoire et de géographie du Japon''; Papinot, (2003)"Date", ''Nobiliare du Japon'', p. 5 retrieved 2013-5-5. History The Date family was founded ...

and became a senior retainer.

References

Samurai 1545 births 1610 deaths {{Samurai-stub