Viscount Niwa Nagakuni | |
|---|---|
| 丹羽長国 | |
 Niwa Nagakuni, taken in the late 19th century | |
 10th Daimyō of Nihonmatsu Domain | |
| In office 1858–1868 | |
| Monarchs | Shōgun |
| Preceded by | Niwa Nagatomi |
| Succeeded by | Niwa Nagahiro |
| Personal details | |
| Born | May 22, 1834 Nihonmatsu, Japan |
| Died | January 15, 1904 (aged 69) |
| Resting place | Aoyama Cemetery, Tokyo, Japan |
| Spouse | daughter of Toda Ujimasa of Ōgaki Domain |
| Parent |
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Viscount Niwa Nagakuni (丹羽長国, May 22, 1834 – January 15, 1904) was an Edo period Japanese samurai, and the 10th daimyō of Nihonmatsu Domain in the Tōhoku region of Japan. He was the 11th hereditary chieftain of the Niwa clan. His courtesy title was Saikyō-no-daifu, and his Court rank was Junior Fourth Rank, Lower Grade.[1]