In 1581, Toshiie was appointed as the lord of Noto Nanao-jo Castle (Nanao City, Ishikawa Prefecture), and he became a daimyo who owned the territory of 230,000 koku in Noto.
天正9年（1581年）に能登七尾城（石川県七尾市）主となり、能登23万石を領有する大名となった。