Niwa clan
was the 2nd Niwa "daimyō" of Nihonmatsu Domain, and 3rd hereditary chieftain of the Niwa clan. His courtesy title was "Saikyō-no-daifu", and his Court rank was Junior Fourth Rank, Lower Grade. He was the eldest son of Niwa Mitsushige, and was received in formal audience by Shōgun Tokugawa Ietsuna in 1653. he became "daimyō" in 1679 on the retirement of his father. he did not share his father's love of the arts, or of Confucianism, and his tenure was largely uneventful. In 1692, he received the honorary court title of chamberlain ("Jijū") shortly before his death. As he had no son, the domain went to his younger brother.