The Tsugaru of Mutsu province were at first known as the Ôura and their origins are unclear but they may have been a branch of the Nanbu. They held Ôura castle and were vassals of the Nanbu until they rebelled in the Sengoku Period after a period of worsening relations. Tsugaru (Ôura) Tamenobu defended his lands against the Nanbu and others and was confirmed in his domains after supporting Tokugawa Ieyasu in the Sekigahara Campaign (1600). The Tsugaru resided at Hirosaki castle until the end of the Edo Period.
References
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005