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 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...

, who served the Takeda clan. He was the successor of his father Masatoshi in the ranks of the senior Takeda retainers, and was given command of 250 cavalry. Masanao was driven out of Takatō Castle following a siege in 1582, but was soon allowed to return through the assistance of the Hojo clan. Following a brief conflict with 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...

's forces, Masanao became a Tokugawa retainer, and was allowed to retain Takatō. He took part in the siege of Odawara Castle under Ieyasu's command, and moved to the Kantō region together with Ieyasu. In the Kantō, Masanao was granted the Tako Domain

Tako Domain

was a minor Japanese domain of the Edo period, located in Shimōsa Province , Japan. It was centered on what is now part of the town of Tako in Katori District. It was ruled for most of its history by the Matsudaira clan....

.