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....

.

Biography

Tadatoshi was the son of Aoyama Tadanari, a Tokugawa vassal 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 was born in Mikawa Province

Mikawa Province

is an old province in the area that today forms the eastern half of Aichi Prefecture. It was sometimes called . Mikawa bordered on Owari, Mino, Shinano, and Tōtōmi Provinces....

. Tadatoshi, like his father, was a Tokugawa vassal, and was famous for his role as the third shogun Iemitsu

Tokugawa Iemitsu

Tokugawa Iemitsu was the third shogun of the Tokugawa dynasty. He was the eldest son of Tokugawa Hidetada, and the grandson of Tokugawa Ieyasu. Iemitsu ruled from 1623 to 1651.-Early life :...

's teacher.

He became a daimyo in 1603, when 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...

 granted him the domain of Edosaki.

Further reading

• Bolitho, Harold
  Harold Bolitho
  Harold Bolitho was an Australian academic, historian, author and professor emeritus in the Department of East Asian Languages and Civilizations at Harvard University The name Bolitho is of Cornish origin.-Career:...
  
  . (1974). Treasures Among Men: The Fudai Daimyo in Tokugawa Japan. New Haven: Yale University Press. 10-ISBN 0-300-01655-7/13-ISBN 978-0-300-01655-0; OCLC 185685588
• Kodama Kōta 児玉幸多 , Kitajima Masamoto 北島正元 (1966). Kantō no shohan 関東の諸藩. Tokyo: Shin Jinbutsu Ōraisha.