Toshinao was the first [[Edo period]] lord of [[Morioka han]], in northern [[Tohoku|Tôhoku]].
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Toshinao was the son of [[Nanbu Nobunao]] and resided at [[Morioka castle]]. He supported [[Tokugawa Ieyasu]] during the [[Sekigahara Campaign]], leading his men to aid [[Mogami Yoshiaki]] and [[Date Masamune]] against the forces of [[Uesugi Kagekatsu]]. After the campaign was concluded, Toshinao was confirmed in his 100,000 [[koku]] fief.
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The son of [[Nanbu Nobunao]] and lord of [[Morioka castle]], he supported [[Tokugawa Ieyasu]] during the [[Sekigahara Campaign]], leading his men to aid [[Mogami Yoshiaki]] and [[Date Masamune]] against the forces of [[Uesugi Kagekatsu]]. After the campaign was concluded, Toshinao was confirmed in his 100,000 ''[[koku]]'' fief.
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Toshinao participated as well in the [[Osaka Winter Campaign]], and was so trusted by the Tokugawa that he was entrusted with overseeing the education of [[Tokugawa Yorinobu]], Ieyasu's tenth son.