Nihonmatsu Domain
was the 4th Niwa "daimyō" of Nihonmatsu Domain, and 5th 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 Nagayuki and became "daimyō" in 1701 on the death of his brother. He was received in formal audience by Shōgun Tokugawa Tsunayoshi the same year. His wife was a daughter of Abe Masakune of Fukuyama Domain. He died in 1728 without heir. His grave is at the temple of Dairin-ji in Nihonmatsu.