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. | 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. |