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....

. He was the son of 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 son-in-law Okudaira Nobumasa. Due to this family connection, he was allowed to use the Matsudaira surname. He was briefly adopted by Suganuma Sadatoshi; however, this adoption lasted for only five years. Upon Nobumasa's death, Tadamasa succeeded him as lord of the Kanō Domain

Kano Domain

The ' was a Japanese domain of the Edo period, located in Mino Province .-History:The territory of the Kanō domain was once ruled from Gifu, by Oda Hidenobu, Oda Nobunaga's grandson. However, as Hidenobu sided with Ishida Mitsunari at the Battle of Sekigahara, his territory was confiscated by...

.